人教八下Unit8 Grammar focus (共32张PPT)

内 页 篇
The structure of the present perfect tense
动词的过去分词的变化和过去式的变化 并不完全相同。今天我们主要针对过去分词 与过去式相同的部分单词进行整理，把它们 作一个大致的分类。 (注：例子中单词的变化顺序为：动词原形 → 动词的过去式 → 动词的过去分词)
3)Jenny has finished her homework.
内 页 篇
Has Jenny finished her homework? ) (改为一般疑问句并做否定回答
No,she hasn't.
The basic sentence patterns
burn → burnt → burnt; dream → dreamt → dreamt; mean → meant → meant 结尾的字母d变t。如： lend → lent → lent; build → built → built; send → sent → sent
内 页 篇
The structure of the present perfect tense
以“辅音字母 + y”结尾的动词，变y为i，再加-ed。如： study → studied → studied; hurry → hurried → hurried; reply → replied → replied
3 4
内 页 篇
词尾只有一个辅音字母的重读闭音节动词，要双写辅 音字母，再加-ed。如： stop → stopped → stopped; clap → clapped → clapped
The basic sentence patterns
肯定式
主语+助动词have/has+动词的过去分词“.”
疑问式
助动词have/has+主语+动词的过去分词“？”
否定式
主语+助动词have/has+not+动词的过去分词 “.”
内 页 篇
The basic sentence patterns
内 页 篇
The structure of the present perfect tense
1
1
一般在动词词尾直接加ed。如： pick → picked → picked; wish → wished → wished; stay → stayed → stayed
4
规则 变化
3
2
2
以不发音的e结尾的动词后面加d。如： like → liked → liked; hope → hoped → hoped; phone → phoned → phoned
Write the forms of the past tense and past participle: cut cut cut ______ ______ swept sweep ______ spent spend ______
learn think ______ learnt thought ______
『 灭 绝 时 态 』 之 现 在 完 成 时
Lead-in
内 页 篇
Contents
现 在 完 成 时 的 时 间 状 语
Adverbial clauses of the present perfect tense
0 4
现 在 完 成 时 的 用 法
The usage of present perfect tense
The structure of the present perfect tense
5
不规则 变化
5 8 6 9 7
以不变应万变。如： let → let → let; put → put → put; 变为以-ought或-aught结尾。如： read → read → read buy → bought → bought; bring → brought → brought; catch → caught → caught; teach → taught → taught 若中间有双写 e ，则去掉一个 e ，单词末尾再加 t。如： feel → felt → felt; keep → kept → kept; sleep → slept → slept 结尾加 t。如：
内 页 篇
A: Have you surfed the Internet (上网)? B: Yes, I have. I have surfed the Internet.
No, I haven’t. I haven’t surfed the Internet.
The basic sentence patterns
Transform the sentence patterns 1) We have visited the museum. (改为一般疑问句)
Have you visited the museum? They haven’t seen the film. (改为否定句) 2)They have seen the film.
The structure of the present perfect tense
01Βιβλιοθήκη 内 页 篇Contents
The structure of the present perfect tense
have（has）+过 去分词 现在完成时是由“助动词have/has+动词的 过去分词”构成。其中，助动词要和主语的 人称、数保持一致。
0 3
现 在 完 成 时 的 基 本 句 型
The basic sentence patterns of the present perfect tense
0 2
现 在 完 成 时 的 构 成
The structure of the present perfect tense
0 1
现 在 完 成 时 的 构 成
swept ______ spent ______
______ learnt thought ______
内 页 篇
Test 1
The basic sentence patterns of the present perfect tense
现 基在 本完 句成 型时 的
02
内 页 篇
Contents