i expect to write back.这句话里为什么可以出现2个动词?

i expect to write back.这句话里为什么可以出现2个动词? I don't expect you to wait. I don't expect you to wait expect to I like to write (story). I know what to expect怎么变被动句? .I expect to be there this evening急! what I expect to get out of college 翻译为什么? 英语翻译I hardly ever expect things to go my way. I expect to see my good friends.(改为同义句) i want her to write to()soon I expect to win 的句子结构问题.I 主语 expect 谓语（不及物动词） to win 表目的状语? i have something _,but i have no pen_.a)to write /to write with b)write/to write i have a pen to write还是/write with I (write/am going to write) a report 选哪个? I expect my friends can come my school对吗?还有I expect my friends to come my school对吗? i write, coz i wanted to.?对?为什么不是I WRITE ,coz i want to.? I often write to him.和I write often to him.和I write to him often.有什么区别