挑战英语题句子时不同能填入相同动词形式重要考点

挑战英语题 句子时不同, 能填入相同动词形式？重要考点

我们先来看这五个句子。

1 They are on the playground, and they're playing table tennis.

他们在球场上，而且他们正在打乒乓球。

2 They were on the playground and they were playing table tennis.

那时他们在球场上，而且他们正在打乒乓球。

3They will be on the playground and play table tennis.

他们将在球场上，而且打乒乓球。

4 They stayed on the playground and played table tennis yesterday.

昨天他们待在球场上，而且打乒乓球。

5 He often stays on the playground and plays table tennis.

他经常待在球场上，而且打乒乓球。

第六到第十个句子，括号中填写动词的什么形式？

6 They are on the playground, ___[play] table tennis.

7 They were on the playground, ___[play] table tennis.

8 They will be on the playground, __

[play] table tennis.

9They stayed on the playground,__[play] table tennis yesterday.

10He often stays on the playground, __[play] table tennis.

答案: 五句都填 playing，意思跟开头给的句子是一样的。

ing结构放句未的意思是并且怎么样，这里表示: 并打乒乓球。

这是非谓语，是没有时态的。所以不管上面是现在时，过去时，将来时，三单，都一样。

问题:

如果这些句子中间那个逗号删去，该填什么呢？

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