What
What do you do yesterday？
do you do yesterday？
这是一个错句，What do you do yesterday？（你昨天做了什么？）这句话时态用错了，因为yesterday（昨天）所做的事情都是过去了的，因此应该用一般过去时，这句话应该改为:
What did you do yesterday
但如果这个行为动作是每天的做的，我们可以用一般现在时:
What do you do everyday(你明天忙什么？)
whatdoyoudoyesterday怎么回答？
I did my homework and watched TV. 注意用过去时回答就可以了。
what did you do yesterday?写作文？
I had a busy day yesterday.
I got up at six in the morning, then I brushed teeth and washed my face and hands. After that I had my breakfast.I had an egg and some porridge. I went to school by bus.I got to school at 7:45，The first class begins at eight oclock.I had four classes in the morning,I had lunch at school. I had two classes in the afternoon. We did exercise after class for an hour. We went home at 4:40 in the afternoon. I had supper at 6:30 with my family.I watched TV for half an hour, then I did my homework. I went to bed at ten oclock. That was my busy day, Yesterday.