He was seen ( ) upstairs.

he was nowhere to be seen. He was seen to cross the street. he was seen playing by me he was seen to drink.这个句子对吗? he was seen drinking.呢? it happened that i was reading upstairs when he came in的同义句 16.Believe it or not,he was seen_____ upstairs just now. he was seen ____(go) out by me He was often seen _________(talk)a walking the streat. He was seen () in the reading room an hour ago. 1.He was interested in_____he had seen at the exhibition. He was nowhere to be seen.为什么要用不定式 1.-Henry doesn't seen to be what he was.