是did you happy 还是 were you happy?

是did you happy 还是 were you happy? Were you happy? 是wish you happy还是wish you are happy Were you happy?怎么回答 were you happy yesterday?这个怎么回答 were you happy last niaght?怎么回答 I wish you were happy.语法对吗 We were singing,"Happy birthday to you..." You were very happy,Ithink.Yes,I___ ___ you happy yesterday? Yes,I ___. A.did;does B.were;was C. May you happy.还是May you be happy. 请问是Happy birthday to you.还是Happy birthday with you.