[Grammar Challenge+Teacher's Compilation] 2019 Nat
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Tense and
03 voice change rules of modal
verbs
The rules for the change of present and past tenses
Modal verbs have no infinitive or participle forms, and the main change is in tense. The present tense and past tense of modal verbs are mostly regular, such as "can" in the present tense becomes "could" in the past tense.
Modal verbs can also be used in passive voice sentences to express the relationship between the subject and the verb.
The use of modal verbs in passive voice sentences can help to express different degrees of certainty or possibility about an action or state.
• The position and variation rules of modal verbs in sentences
• Tense and voice change rules of modal verbs
• Differences and connections between modal verbs
Function
Modal verbs serve to modify the main verb in a sentence, expressing the speaker's attitude or judgment about the action or state described by the main verb. They can also be used to express various shades of meaning, from strong certainty to mild suggestion.
Some modal verbs have special forms for past tense, such as "ought to" for the past tense of "should".
Modal verbs are followed by the base form of the verb, and the tense of the sentence is indicated by the modal verb itself.
Some common modal verbs in declarative sentences include "can," "could," "may," "might," "must," "shall," "should," "will," and "would."
Example: "I can swim." (I am able to swim.)
List of Common Modal Verbs
Ought to
Expressing obligation or duty.
Need to
Expressing necessity or requirement.
Dare to
Expressing courage or challenge.
Classification of modal verbs
目录
• Analysis of Common Test Points for Modal Verbs in the College Entrance Examination
• Practice of real college entrance examination questions and guidance on problem-solving skills
List of Common Modal Verbs
01
02
03
Can/Could
Expressing possibility, ability, or permission.
May/Might
Expressing possibility or probability.
Must
Expressing necessity or obligation.
The combination of modal verbs and negation allows the speaker to deny the possibility, necessity, or permission of an action or state.
Example: "I cannot swim." (I am not able to swim.)
Position in interrogative sentences
In interrogative sentences, modal verbs typically come at the
beginning of the sentence before the subject to form a question.
Rules of change in passive voice
In passive voice sentences, modal verbs are followed by the past participle of the main verb, and the subject is placed after the verb phrase.
The position
02 and variation rules of modal verbs in sentences
Position in declarative sentences
Modal verbs usually come before the main verb in declarative sentences to express the speaker's attitude or judgment about the action or state described by the main verb.
Rules for changing the perfect and continuous time
Modal verbs can be used in perfect and continuous tenses to express actions that have been completed or are still in progress.
List of Common Modal Verbs
Shall/Should
Expressing future actions or obligations.
Will/Would
Expressing future actions or
habits,
or
expressing
willingness or requests.
Differences
04 and connections between modal verbs
Basic Concepts
01 and Classification
of Modal Verbs
Definition and Function
Definition
Modal verbs, also known as modal auxiliaries or modals, are a small group of verbs that are used to express modality, which includes concepts such as possibility, probability, necessity, permission, ability, and obligation.
In the continuous tense, modal verbs are followed by the present participle of the main verb, such as "be + present participle".
In the perfect tense, modal verbs are followed by the past participle of the main verb, such as "have/has + past participle".
• Dynamic modals: These modal verbs express ability or willingness to perform an action. They include "can," "could," "will," "would," and "dare to." For example, "I can swim across the pool" (ability); "He would help you if he could" (willingness).
• Epistemic modals: These modal verbs express degrees of certainty or probability about a proposition. They include "must," "can," "could," "may," and "might." For example, "He must be at home because his car is in the driveway" (certainty); "It could rain later" (possibility).
The use of modal verbs in interrogative sentences allows the
speaker to inquire about the possibility, necessity, or permission
of an action or state.
Example: "Can you swim?" (Are you able to swim?)
[Grammar Challenge+Teacher's Compilation] 2019 National College
汇报人：XX
Entrance Examination English General Review
目录
• Basic Concepts and Classification of Modal Verbs
• Deontic modals: These modal verbs are concerned with necessity, permission, or obligation. They include "must," "should," "ought to," and "need to." For example, "You must finish your homework before you can play" (necessity); "You should apologize for what you did" (obligation).
Position in negative sentences
In negative sentences, modal verbs are typically placed after the negative word "not" and before the main verb to express negation.
Tense and
03 voice change rules of modal
verbs
The rules for the change of present and past tenses
Modal verbs have no infinitive or participle forms, and the main change is in tense. The present tense and past tense of modal verbs are mostly regular, such as "can" in the present tense becomes "could" in the past tense.
Modal verbs can also be used in passive voice sentences to express the relationship between the subject and the verb.
The use of modal verbs in passive voice sentences can help to express different degrees of certainty or possibility about an action or state.
• The position and variation rules of modal verbs in sentences
• Tense and voice change rules of modal verbs
• Differences and connections between modal verbs
Function
Modal verbs serve to modify the main verb in a sentence, expressing the speaker's attitude or judgment about the action or state described by the main verb. They can also be used to express various shades of meaning, from strong certainty to mild suggestion.
Some modal verbs have special forms for past tense, such as "ought to" for the past tense of "should".
Modal verbs are followed by the base form of the verb, and the tense of the sentence is indicated by the modal verb itself.
Some common modal verbs in declarative sentences include "can," "could," "may," "might," "must," "shall," "should," "will," and "would."
Example: "I can swim." (I am able to swim.)
List of Common Modal Verbs
Ought to
Expressing obligation or duty.
Need to
Expressing necessity or requirement.
Dare to
Expressing courage or challenge.
Classification of modal verbs
目录
• Analysis of Common Test Points for Modal Verbs in the College Entrance Examination
• Practice of real college entrance examination questions and guidance on problem-solving skills
List of Common Modal Verbs
01
02
03
Can/Could
Expressing possibility, ability, or permission.
May/Might
Expressing possibility or probability.
Must
Expressing necessity or obligation.
The combination of modal verbs and negation allows the speaker to deny the possibility, necessity, or permission of an action or state.
Example: "I cannot swim." (I am not able to swim.)
Position in interrogative sentences
In interrogative sentences, modal verbs typically come at the
beginning of the sentence before the subject to form a question.
Rules of change in passive voice
In passive voice sentences, modal verbs are followed by the past participle of the main verb, and the subject is placed after the verb phrase.
The position
02 and variation rules of modal verbs in sentences
Position in declarative sentences
Modal verbs usually come before the main verb in declarative sentences to express the speaker's attitude or judgment about the action or state described by the main verb.
Rules for changing the perfect and continuous time
Modal verbs can be used in perfect and continuous tenses to express actions that have been completed or are still in progress.
List of Common Modal Verbs
Shall/Should
Expressing future actions or obligations.
Will/Would
Expressing future actions or
habits,
or
expressing
willingness or requests.
Differences
04 and connections between modal verbs
Basic Concepts
01 and Classification
of Modal Verbs
Definition and Function
Definition
Modal verbs, also known as modal auxiliaries or modals, are a small group of verbs that are used to express modality, which includes concepts such as possibility, probability, necessity, permission, ability, and obligation.
In the continuous tense, modal verbs are followed by the present participle of the main verb, such as "be + present participle".
In the perfect tense, modal verbs are followed by the past participle of the main verb, such as "have/has + past participle".
• Dynamic modals: These modal verbs express ability or willingness to perform an action. They include "can," "could," "will," "would," and "dare to." For example, "I can swim across the pool" (ability); "He would help you if he could" (willingness).
• Epistemic modals: These modal verbs express degrees of certainty or probability about a proposition. They include "must," "can," "could," "may," and "might." For example, "He must be at home because his car is in the driveway" (certainty); "It could rain later" (possibility).
The use of modal verbs in interrogative sentences allows the
speaker to inquire about the possibility, necessity, or permission
of an action or state.
Example: "Can you swim?" (Are you able to swim?)
[Grammar Challenge+Teacher's Compilation] 2019 National College
汇报人：XX
Entrance Examination English General Review
目录
• Basic Concepts and Classification of Modal Verbs
• Deontic modals: These modal verbs are concerned with necessity, permission, or obligation. They include "must," "should," "ought to," and "need to." For example, "You must finish your homework before you can play" (necessity); "You should apologize for what you did" (obligation).
Position in negative sentences
In negative sentences, modal verbs are typically placed after the negative word "not" and before the main verb to express negation.