現(xiàn)在進(jìn)行時(shí)
肯定：1.I'm doing my homewok.
2.Be quiet!The baby is sleeping.
3.The children are playing games now.
4.Tom is talking to his boss so you can't get in.
5.We don't have tools to repair the door because Mary is using them.
否定：1.I'm not doing my homework.
2.At this moment,the baby isn't sleeping.
3.The children aren't playing games now.
4.Tom isn't talking to his boss so you can get in now.
5.We have tools to repair the door because Mary isn't using them.
疑問：1.Are you doing your homework?
2.Is the baby sleeping at this moment?
3.Are the children playing games now?
4.Is Tom talking to his boss?
5.Is Mary using the tools?
一般現(xiàn)在時(shí)
肯定：1.I usually do my homework after dinner.
2.The baby always sleeps at this time.
3.The children often play games with their teachers.
4.Tom sometimes talks to his boss in the afternoon.
5.Mary seldom uses the tools.
否定：1.I don't usually do my homework after dinner.
2.The baby doesn't always at this time.
3.The children don't often play games with their teachers.
4.Tom sometimes doesn't talk to his boss in the afternoon.
5.Mary seldom doesn't use the tools.
疑問：1.Do you usually do your homework after dinner?
2.Does the baby always sleep at this time?
3.Do the children often play games with their teachers?
4.Does Tom sometimes talk to his boss in the afternoon?
5.Does Mary seldom use the tools?