be useful to是加do还是加ing?
difficult是加动词ing?还是加to do sth.
be going to do going是动词加ing吗
like后面加to do还是ing
be practicing后面该加to do 还是ing呢还是动词原形呢
be going to 加动词ing 还是动词加S?
it's no good 是加动词ing形式还是加to do sth.
be honoured to 后面加动词原形,还是ing形式
practise后面加动词ing还是to do?
tries后加ing还是to do的形式
是be useful for 还是be useful to?
在英语中,relax是用原型还是加ing加to do,(还有interest之类的)
do well in后面是加动词原形还是ing