用expose的正确形式填空()tosunlightforlongisnotgoodforyourskin.()tosunlight,heenjoyedhimselfonthebeautifulbeach.()tosunlightforanhour,hewentbacktohaveashower.

问题：用expose的正确形式填空()tosunlightforlongisnotgoodforyourskin.()tosunlight,heenjoyedhimselfonthebeautifulbeach.()tosunlightforanhour,hewentbacktohaveashower.

答案：↓↓↓

汤春球的回答：

网友采纳　　1tobeexposed　　非谓语动词中只有不定式和动名词可以做主语,因为要表被动,只能用tobeexposed　　2exposed　　过去分词表被动,做状语　　3havingbeenexposed　　过去分词的完成时,强调动作发生在主句动作之前