用所给动词的正确形式填空 He ——(teach) there since he came to this city

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用所给动词的正确形式填空 He ——(teach) there since he came to this city
用所给动词的正确形式填空 He ——(teach) there since he came to this city

用所给动词的正确形式填空 He ——(teach) there since he came to this city
has taught
接时间状语从句 主句的谓v.用现在完成时,而且须是延续性动词;从句的谓v.用一般过去时,而且须是终止性动词.

has taught

has been teaching

He —had been teaching—(teach) there since he came to this city

has been teaching

had taught
有不会的可以再问我