当句子里有过去式和过去进行式时要怎样分辨 帮下 急吖!
问题描述：
当句子里有过去式和过去进行式时要怎样分辨 帮下 急吖!
例如：1) Yesterday afternoon,it ____________________ (rain) heavily,so we _____________ (decide) to stay at home.
2) Everyone _____________________ (listen) carefully.Suddenly there __________ (be) a loud bang and the fire alarm _______________ (go) off.
3) I _____________________ (read) a book when the phone _________________ (ring).
4) While he ____________________ (swim) in the river,a snake __________ (bite) his leg.
答
1 was raining,decided
2 listened,was,went
3 read,was ringing
4 was swimming,was biting