助动词和情态动词改错问题3When a friend gave John a ticket to the game,he couldn't help but (going).括号里的是错的.要把going改成go,为什么呢?
问题描述：
助动词和情态动词改错问题3
When a friend gave John a ticket to the game,he couldn't help but (going).
括号里的是错的.要把going改成go,为什么呢?
答
no.是help do sth.是固定搭配，把握好这个规律后，前面后面加什么就是自己的事咯。
答
couldn't help but do是固定搭配吧
答
加动词原形是固定用法,比如I HATE TO DO NOTHING BUT WATCH TV
但如果后面加的动词DO,就要用BUT TO DO,比如I HAVE FINISHED EVERYTHING BUT TO DO MY HOMEWORK
答
couldn't help(情不自禁)相当于情态动词.
can, may, must后面跟什么, 他后面就跟什么!