新概念英语第一册课后答案及解析85-86

2021-08-10 16:15:00来源:网络

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  Written exercises 书面练习

  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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