observedo、doingsthHeobservedamango/goingintothebank.（go全过程,going正在进行）否定时要把to补出来那么这句话是否可以变成,Astrangerwasobservedtogointothebank.Astrangerwasobservedtogoingintothebank

Question

observe do 、doing sth
He observed a man go/going into the bank.（go全过程,going正在进行）
否定时要把to补出来 那么这句话是否可以变成,
A stranger was observed to go into the bank.
A stranger was observed to going into the bank.
第二句对吗?为什么?

Answer 1

不对,像observe watch等词,主动用do something 被动用to do sth.而对与一切doing 也就是现在分词行式的,不管主动还是被动,否定都在doing前加not这我很确定.