来自杜利民的问题
Thethiefwasobserved____thingsinthesupermarketandwascaughtonthespotA.stealB.tostealC.stealing
Thethiefwasobserved____thingsinthesupermarketandwascaughtonthespot
A.steal
B.tosteal
C.stealing


Thethiefwasobserved____thingsinthesupermarketandwascaughtonthespotA.stealB.tostealC.stealing
Thethiefwasobserved____thingsinthesupermarketandwascaughtonthespot
A.steal
B.tosteal
C.stealing
选C,observesb.doingsth.发现某人做某事,被动sb.isobserveddoingsth.
另有词组:observesb.dosth.表示经常看到某人做什么事,被动为sb.isobservedtodosth.
observe表被动时,to要加,那为什么c(没to)也行?
如果主动时是observesb.dosth,表示观察某人做某事的整个过程,就是指有意识地去观察别人做某事。被动句要加to。如果主动时是observesb.doingsth,指无意地,恰好看到某人正在做某事,被动句不用加to。