题目

过去进行时时间状语从句中的谓语动词要用过去式吗
1、过去进行时 时间状语从句中的谓语动词要用过去式吗?
例：I was having dinner when Tom call me from UK yesterday evening这样的句子成立吗?
2、They ----- ------ to America three times 在空格处填上适当的词

提问时间：2020-10-30

答案

1 要,即：I was having dinner when Tom called me from UK yesterday evening.
2、They ( have been )to America three times
他们到过美国三次了.
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