A 篇章学习:朗读对话，回答问题
Hans: Have you been to your parents' home yet?
Luna: Yes, darling. I have already been there. And I am in the supermarket now.
Hans: Have you bought more bread yet?
Luna: Ah, not yet. I forgot. I'll buy some. Do we have milk? I haven't bought it yet.
Hans: Don't worry. I have got that already.
Luna: Great!
B 语法聚焦1: 现在完成时陈述句中already的用法
already经常用于现在完成时的肯定句式中，意思是“已经”。
小贴士
在现在完成时肯定句中，already可放在have/has和动词的过去分词之间，也可以放在句末，表示强调“已经发生”这个事实，即：
① 主语 + have / has + already + 动词过去分词 + 其他成分;
② 主语 + have / has + 动词过去分词 + 其他成分 + already。
练习1 连词成句。
1 They / that / film / have / seen / already / .
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2 have / I / written / already / a short novel / .
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3 already / has / visited / Helen / us / many times / .
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C 语法聚焦2: 现在完成时陈述句中yet的用法
小贴士
在现在完成时否定句中，yet可放在haven't / hasn't和动词的过去分词之间，也可以放在句末，表示强调“还没做，尚未发生”，即：
① 主语 + haven't / hasn't + yet + 动词过去分词 + 其他成分;
② 主语 + haven't / hasn't + 动词过去分词 + 其他成分 + yet。
练习2 使用yet将肯定句改写为否定句。
1 They have already had lunch.
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2 Jack has gone to school already.
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3 The dog has already tried the new toy.
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4 I have bought many books already.
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练习3 根据意思将紧密关联的句子连线。(www.xing528.com)
D 语法聚焦3:现在完成时疑问句中yet的用法
yet常用于现在完成时的一般疑问句句末，表示询问某件事是否已经发生。句式结构为：Have/Has + 主语 + 动词过去分词 + 其他成分 + yet?
以上文句子为例，回答现在完成时的一般疑问句时：
使用already的肯定回答：Yes, I have been there already.
或简略形式：Yes, I have.
小贴士
使用yet的否定回答：No, I haven't been there yet.
或简略形式：No, not yet.
练习4 选词填空。
单元练习
练习5 单项选择。
1 ( ) - _________ Kate and her friend gone home yet?
- I don't know. They have _________ already.
A. Has, left B. Have, left C. Have, leave
2 ( ) Mom and Dad _________ _________ to work yet.
A. haven't, gone B. have, gone C. haven't, go
3 ( ) Danny has already _________ more snacks for everyone.
A. bring B. brought C. brings
4 ( ) We have _________ that film _________.
A. see, already B. seen, yet C. seen, already
5 ( ) - Have I told you about my new pet _________?
- No, not _________.
A. already, yet B. yet, yet C. yet, already
练习6 用所给内容的合适形式写出现在完成时的句子。
1 I / have / eat up / everything / already / .
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2 my elder brother / have / not / get up / yet / .
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3 have / Judy / be / to / the museum / yet / ?
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4 have / they / clean / the bedroom / and / the bathroom / yet / ?
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5 have / the park / visit / already / My classmates and I / .
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