prioritize是什么意思
cant help doing sth是什么意思
keep doing sth是什么意思
try to do sth和try doing sth的区别
stop doing sth是什么意思
waste time to do 还是doing sth
see sb doing sth造句
prefer doing sth to doing sth
love doing sth和love to do sth
have trouble (in) doing sth