单词详解
aux.v. (can的过去式)
A. 表示允准
Could I use your phone? 我能用一下你的电话吗?
B. 表示请求
Could I come round next week? 我下星期来拜访好吗?
C. 表示结果
He couldn't pass his examination. 他没能考及格。
D. 表示可能性
It could be my mother. 那可能是我母亲。
E. 表示建议
We could write a letter to him. 我们不妨给他写封信。
相关词组
1. could have done 本来是能够做,本可以做
You could at least have sent a letter. 你本可以寄封信来。
2. It could not be helped. 没有办法
It could not be helped, so do not let it bother you too much. 这是没有办法的,所以你别太烦恼了。