1.It's adj for sb to do sth
2.直接加名词活动词的doing形势
3.我认为其实基本上双方都可以混合用,你可以去问一下老师,毕竟它比我懂得多!
4.最好不要,因为一般放在中间的都是宾格形势,比如put on my gloves =put them on 戴上我的手套.
5.look up,put off,help with,land in,arrive at,land on,ask for,run out of,find out,take away 这些词都是加宾语的
[learn doing][learn do]][study to do][study do][study doing]全不对
只有learn to do对了 是学习做什么的意思