unit1grammar1
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might very formal but seldom used
Dad, c_o__u_l_d
(may, could) I take your camera?
Yes, you _c_a_n_
(can, may).
_M__a_y___ (May, Can)
I borrow this helmet?
—Of course. 当然可以。
b) —Can I have some milk, Mum? 妈妈，我可以喝点牛奶吗？
could 是can的过去式，在口语中，could 常 用来代替 can向对方更委婉地提出请求，用 法上比can正式，可以用于向老师或长辈提 出请求，这时could不表示过去，回答一般 还是用can。如：
• If I want to borrow a dictionary from a student, I should say, “____C__a_n__I_u_s_e__y_o_u_r_________ d_ic_t_i_o_n_a_r_y_?____”.
Now If a student wants to borrow a book from me, what should he/she say? ——Could I use your book, Mr Zhao? ——Yes, you ___c_a_n_____.
a) —Could I use your computer, please? 请问，我可以用一下你的电脑吗？
—Yes, you can. 可以。
b) —Could I hand in our homework later, Mr Lin? 林老师，我可以稍后交作业吗？
—No, you can’t. 不，不行。
Can you show us what the two words mean? Could I use your dictionary?
Can I use your dictionary?
From the words above, we can know that we can use ‘can’, ‘could’, ‘may’, ‘might’ to talk about permission, and these four words have different degrees of formality.
informal can used to ask if it is Ok to do sth
formal
Formal ቤተ መጻሕፍቲ ባይዱnd polite
Very formal
often used to ask permission could from strangers, old people,
teachers and bosses used in formal situations to ask may if it is OK to do sth
—No, you can’t . 不行。
might是may的过去式，它也可以用来 表示征求对方意见，不过很少用。might 在语气上比may更婉转，但不如may表 现得那么自信，这时might不表示过去时 态，肯定回答时通常用may。如：
a) —Might I join you? 我可以加入你们吗？
2. may与might may也可以用来征求对方意见，意为 “可以”，相当于could，用法也比 can更正式，更礼貌，一般用于向陌生 人或所尊敬的人请求许可。如：
a) —May I ask you a question? 我可以问你一个问题吗？
—Yes, please. 可以，请问。
b) —May I come in, Mr Wu? 吴老师，我可以进来吗？
S: _M__u_s_t_ I do it now? M: Well, you n__e_e__d_n_’_t. After lunch, you m__a__y_/_chaanve a rest.
S: Mum, _c_o__u_l_d__ I use your computer? I want to search
for some information.
M: Sorry, you __c_a_n__’t__ use it now. I am busy. And I think youo_u__g_h_t_t_o____ spend more time on your homework.
Unit 1 Life on Mars Grammar 1
can, could, may, might 都可以用来表 示请求或给予许可。但 用法上有一些区别：
1. can与could can 常用于口语中，表示非正式的 请求，请求对象一般是家人或朋友。 如：
a) —Can I borrow your bike, Simon? 西蒙，我可以借一下你的自行车 吗？
—Yes, you may. 可以。
b) —Might I have a look at your new plan?
我可以看一下你的新计划吗？
— No, you may not. 不，不行。
Fill in the blanks
• This morning ×××was late. If he wanted to come into the classroom, he should say, “_M__a_y__I _c_o_m__e_i_n_?__”
No, you _m__a_y__n_o_t
(couldn’t, may not).
__C_a_n____ (Might,
Can) I borrow your boots?
Yes, you
_c_a__n___ (can,
may).
After borrowing the things he needs, Simon speaks to his mum. Read the dialogue and fill in the blanks with may, can(not), must(not), needn’t, ought to.
Dad, c_o__u_l_d
(may, could) I take your camera?
Yes, you _c_a_n_
(can, may).
_M__a_y___ (May, Can)
I borrow this helmet?
—Of course. 当然可以。
b) —Can I have some milk, Mum? 妈妈，我可以喝点牛奶吗？
could 是can的过去式，在口语中，could 常 用来代替 can向对方更委婉地提出请求，用 法上比can正式，可以用于向老师或长辈提 出请求，这时could不表示过去，回答一般 还是用can。如：
• If I want to borrow a dictionary from a student, I should say, “____C__a_n__I_u_s_e__y_o_u_r_________ d_ic_t_i_o_n_a_r_y_?____”.
Now If a student wants to borrow a book from me, what should he/she say? ——Could I use your book, Mr Zhao? ——Yes, you ___c_a_n_____.
a) —Could I use your computer, please? 请问，我可以用一下你的电脑吗？
—Yes, you can. 可以。
b) —Could I hand in our homework later, Mr Lin? 林老师，我可以稍后交作业吗？
—No, you can’t. 不，不行。
Can you show us what the two words mean? Could I use your dictionary?
Can I use your dictionary?
From the words above, we can know that we can use ‘can’, ‘could’, ‘may’, ‘might’ to talk about permission, and these four words have different degrees of formality.
informal can used to ask if it is Ok to do sth
formal
Formal ቤተ መጻሕፍቲ ባይዱnd polite
Very formal
often used to ask permission could from strangers, old people,
teachers and bosses used in formal situations to ask may if it is OK to do sth
—No, you can’t . 不行。
might是may的过去式，它也可以用来 表示征求对方意见，不过很少用。might 在语气上比may更婉转，但不如may表 现得那么自信，这时might不表示过去时 态，肯定回答时通常用may。如：
a) —Might I join you? 我可以加入你们吗？
2. may与might may也可以用来征求对方意见，意为 “可以”，相当于could，用法也比 can更正式，更礼貌，一般用于向陌生 人或所尊敬的人请求许可。如：
a) —May I ask you a question? 我可以问你一个问题吗？
—Yes, please. 可以，请问。
b) —May I come in, Mr Wu? 吴老师，我可以进来吗？
S: _M__u_s_t_ I do it now? M: Well, you n__e_e__d_n_’_t. After lunch, you m__a__y_/_chaanve a rest.
S: Mum, _c_o__u_l_d__ I use your computer? I want to search
for some information.
M: Sorry, you __c_a_n__’t__ use it now. I am busy. And I think youo_u__g_h_t_t_o____ spend more time on your homework.
Unit 1 Life on Mars Grammar 1
can, could, may, might 都可以用来表 示请求或给予许可。但 用法上有一些区别：
1. can与could can 常用于口语中，表示非正式的 请求，请求对象一般是家人或朋友。 如：
a) —Can I borrow your bike, Simon? 西蒙，我可以借一下你的自行车 吗？
—Yes, you may. 可以。
b) —Might I have a look at your new plan?
我可以看一下你的新计划吗？
— No, you may not. 不，不行。
Fill in the blanks
• This morning ×××was late. If he wanted to come into the classroom, he should say, “_M__a_y__I _c_o_m__e_i_n_?__”
No, you _m__a_y__n_o_t
(couldn’t, may not).
__C_a_n____ (Might,
Can) I borrow your boots?
Yes, you
_c_a__n___ (can,
may).
After borrowing the things he needs, Simon speaks to his mum. Read the dialogue and fill in the blanks with may, can(not), must(not), needn’t, ought to.