He had to ask for tow day's leave because of__(be)terribly ill yesterday
问题描述：
He had to ask for tow day's leave because of__(be)terribly ill yesterday
答
He had to ask for tow day's leave because of_being_(be)terribly ill yesterday
这里是在介词of后面,所以是动词ing形式
翻译：他不得不去请两天的假,因为他昨天严重生病了