For modals, the characteristics of “tense” are not the main signs of time difference.
A.正确
B.错误
正确答案：正确
For modals, the characteristics of “tense” are not the main signs of time difference.
12次阅读
“Can” and “could” in the sense of “possibility” are interchangeable with no difference in time reference.
Modals help main words to form finite verb phrases, in which only one modal can be used, and it is always the first word in the
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