8.Someone called me up in the middle of the night,but they hung up ________I could answer the

问题描述:

8.Someone called me up in the middle of the night,but they hung up ________I could answer the
 8.Someone called me up in the middle of the night,but they hung up _before_I could answer the phone.
有人在半夜给我打电话,但是还没等我接起电话前就挂掉了
这里为什么要用到could 何意

Someone called me up in the middle of the night,but they hung up _before_I could answer the phone.
从直译来看:有人在半夜给我打电话,但是在我(能)接起电话前就挂掉了
这里的could表示我本想接这个电话,但因为响铃时间太短,来不及解.
如果去掉could,就不能说明我是否愿意接这个电话.