worry about 是doing sth还是to do sth
worry about to do sth与 worry about doing sth的区别
what about doing sth还是what about to do sth
是THINK ABOUT DO STH,还是 THINK ABOUT DOING STH?
use sth doing sth还是use sth to do sth
worry about not to do sth
plan+to do sth.还是doing sth.还是 do sth.
expect to do sth还是doing sth?
mind doing sth还是 to do sth
learn+to do sth 还是 doing sth
finish to do sth还是doing sth
promise doing sth还是to do sth
是mind to do sth还是mind doing sth?