What was Li Leo drawing when the teacher came in?老师进来时,林涛正在画什么?
was drawing 是过去进行时。表示过去某一时间正在干某事,其构成形式是was(were)+现在分词。When 表示当时候,when 在本句中起连词作用,引导出一个时间状语从句。例如:
I was reading a book at ten oclock last night.
昨天晚上十点钟我正在读书。
What were you doing when I called you?
昨天我给你打电话的时候,你在干什么?
【He found it very difficult to get to sleep.】
He found it very difficult to get to sleep.他觉得很难入睡。句中的find it +形容词+不定式表示发现干某事怎么怎么样。不定式的内容就是指干某事的内容,但写在后面,而用it 代替不定式写在动词的后面,形容词作it 补语。例如:
I find it hard to finish the work today.
我发现今天难于完成工作。
I feel it very happy to work with you.
我感觉和你一起工作很幸福。
I think it important to have a walk after supper.
我觉得晚饭后散步很重要。
【He was just falling asleep when there was a loud knock at the door.】
He was just falling asleep when there was a loud knock at the door.他刚要入睡,突然就有人大声敲门。
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