用所给动词的正确形式填空He should __(do)his homework first

问题描述:

用所给动词的正确形式填空He should __(do)his homework first

does
因为should是情态动词,情态动词后一般加动词原形
he是第三人称,所以加es

have done= =

He should _do_(do)his homework first