sb happened/happen to do这两个那个对

what happen to sb 还是 what happened to sb sb happened/happen to do这两个那个对 I don't know what___(happen)to him 为什么填的是has happened 而不是happened I don't know what___(happen)to him 为什么填的是has happened 而不是happened didn't know what ___ to her last night.A.was happened B.happen C.happened D.is happened Excuse me,what_____just now?Sorry,I don't.A.to happen B.did happen C.is happening D.happened We don't know when the accident________.A.has happened B.happened C.happening D.to happen Did you see the game?NO I didn't I ____visit my grandparents at that timeA happened to B was happen C happen to D happened -I can't walk any longer,David?-Why?____ A.What happened?B.What did you happen?C.What have you happen?D.What is happened to you? 求happen to讲解我知道有个用法sth happen to sb单练习册上出现过 My father happened to meet an old friend it +happen+that+sb.有这个用法吗有在网上看到happen to 碰巧基本句式为：1.sb.+ happen+to do 2.it +happen+that+sb.+doeg.I happened to meet him yesterday.=It happened that I met him yesterday.昨天我碰巧遇见了他我想问,It hap 用happen,happening,happened造句 whatever what happened,orwill happen... happen to sb 意思 sth.happen to sb. happen to sb 造句 happen to sb.是什么意思? we can't have these sort of things again.A to happen B happening C happened