listen the boy is singing in the class room.(用i can here改写) i can hear the boy _ in the __.

问题描述:

listen the boy is singing in the class room.(用i can here改写) i can hear the boy _ in the __.

第一个空填sing
第二个空填classroom是sings 还是sing是sing。hear sb do表示可以听见hear sb doing 表示听见某人正在做某事这里取第一种。没有hear sb does 这种说法。