新概念英语第一册课后解析85-86_全球视讯

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Written exercises 书面练习

【资料图】

A Look at these two sentences.

注意以下两个例句。

She has already aired the room.

She aired it this morning.

In which of these sentences can we put has?

在下面的句子中有一般过去时和现在完成时两种不同的时态。选出现在完成时的句子，并填上has。

1 She ______ just boiled an egg.

2 She ______ boiled it a minute ago.

3 She ______ never been to China, but he was there in 1992.

4 He ______ already painted that bookcase.

5 He ______ painted it a week ago.

6 She ______ emptied the basket this morning.

7 He ______ just dusted the cupboard.

B Rewrite these sentences.

模仿例句改写以下祈使句。

Example：

Air the room! (this morning)

I"ve already aired the room.

I aired the room this morning.

1 Clean your shoes! (last night)

2 Open the window! (an hour ago)

3 Sharpen your pencil! (a minute ago)

4 Turn on the television! (ten minutes ago)

5 Boil the milk! (yesterday morning)

6 Empty the basket! (yesterday)

7 Ask a question! (two minutes ago)

8 Type that letter! (this morning)

9 Wash your hands! (five minutes ago)

10 Walk across the park! (an hour ago)

11 Paint that bookcase! (a year ago)

12 Dust the cupboard! (this afternoon)

答案：

Lesson 86

A

1 She has just boiled an egg.

3 She has never been to China, but he was there in 1992.

4 He has already painted that bookcase.

7 He has just dusted the cupboard.

B

1 I"ve already cleaned my shoes. I cleaned my shoes last night.

2 I"ve already opened the window. I opened the window an hour ago.

3 I"ve already sharpened my pencil. I sharpened my pencil a minute ago.

4 I"ve already turned on the television. I turned on the television ten minutes ago.

5 I"ve already boiled the milk. I boiled the milk yesterday morning.

6 I"ve already emptied the basket. I emptied the basket yesterday.

7 I"ve already asked a question. I asked the question two minutes ago.

8 I"ve already typed that letter. I typed that letter this morning.

9 I"ve already washed my hands. I washed my hands five minutes ago.

10 I"ve already walked across the park. I walked across the park an hour ago.

11 I"ve already painted that bookcase. I painted that bookcase a year ago.

12 I"ve already dusted the cupboard. I dusted the cupboard this afternoon.

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