1.how about doing sth.还是how about do sth.还是how about to do s

1.how about doing sth.还是how about do sth.还是how about to do sth
2.before/after doing sth.那么before sb.后面是doing,do ,to do?
3.at least 可以用在什么句型上?
4.in the window ,on the window 有什么区别
5.感官动词sound/feel/look等后面加什么词?
6.live in 和live的区别
7.I don't go to bed until finish my homework和I go to bed until finish 的翻译