it __have been Tom that parked the car here ,as he is the only one with car.为什么用must 不用can。不能用can表示经验只谈吗?只有他有车所以是他,这是我的经验。不是这样就能用在肯定句中表示猜测了吗?
a smaller plane ceashed into a hillside 5 miles east of city,___all 4 people on board.为什么用killing 不用killed表示过去发生的事情。
ladies and gentlemen remain ___until the plane has come to stop.
为什么用seated 不用seating表示不变且继续的状态呢?
the house into grew up ____has been taken down and replaced 为什么用in 不用in which
my alarm clock _____(不走了坏掉了)为什么用didnt go off 。 go off不是就表示变坏了吗?为什么还要加否定。
谢谢朋友回答~~~一下