when I walked in the door,the phone was ringing
as you finish your homework we can watch the movie
while I was in the bathroom,my mom was singing.
Since it is so hot,let's go swimming.
when my mother came in,I was watching TV
as I get to Beijing,I will send you a e-mail
while she is dancing,I am singing
Since everybody is here,let's begin.
We must start early,for it will take two hours to drive to the airport.
其他你想法吧