I go to school every day用yesterday改写

I went to school yesterday.
go的过去式是went.还有一道。They watered the young trees变一般疑问句应该是Did they water the young trees?好吧这题我不敢肯定，但是应该是，因为watered是浇水的过去式，又是动词，所以应该用助动词do的过去式did来提问。