had a hard time后面接to do还是doing?

had a hard time后面接to do还是doing? he had a hard time the english exam A pass Bpassing Cpassed D to pass 为什么 I had a really hard time to science this semester.改错句 I had a really hard time ( ) science this termA:to B:with C:in D:for 英语：i had a hard time getting through this novel 这里为什么不是to het through 关于英语 she had had a very hard timeshe had had a very hard time 为什么用两个 had .. They had a hard time __ the plan A.to carry out B.to have carried out I had a really hard time with science这句话中with science 可以用 to study science吗?可不可用I had a really time studying science. there was a time Mathilde had a hard life改错 I had a hard time reading a few pages I had a hard time ——（learn） Endlish. I really had a hard time with history. Li Ming had a hard time( )speak English 如何翻译LiLy had a hard time learning science. They had a hard time r( ) through the dark forest 句子翻译 he had a hard time of it Mary had a hard time finishing all the reading tasks A:is your college life exciting?B:well,l__at the beginningA had hard times adjusting to living on campusB had a hard time adjust to live on campusC had a hard times adjusting to living on campusD had hard times to adjust to live on campus怎么理解