改句子的英语题
The gardener said that he( (cut)) that tree down yesterday.
I told you I ( (have)) never played tennis before.
What does he said that he ( (do)) last weekend?
When does he told you that he ( (buy)) this car?
1,是不是用if引导的句子中的动词都应该是动词原形?
2,我们经常可以看见用can或may代替一些词组.那么can能代替什么词组,may呢?