现在完成时的句子(3)

18、Have you ever been abroad?你出国过吗?
19、I have just turned off the light.我刚刚把灯关上.
20、How long have you been here in Sydney?你来悉尼多久了?
21、Have I ever picked up some rubbish and thrown it into a dustbin?我有没有把垃圾捡起来扔进垃圾筒呢?
22、Have I ever collected waste paper or bottles for recycling?我有没有为回收而收集废旧纸张或瓶子呢?

23、The old man hasn"t returned to his hometown for about fifty years.这位老人约有50年没有回家乡了.
24、I’ve already been there twice.我只去过那里两次。