i found it useless doing还是to do
i found it useless doing还是to do
It is useless doing 或to do 有什么区别
be found+doing还是to do?
it is no useless to do=it is no use doing
i find it to do sth adj 还是 i found it adj to do sth
it's adj+to do还是doing?
it is fun to do 还是 doing?
It’s fun to do还是doing
分析句子结构:I found it impossible to do it..
分析句子结构:I found it impossible to do it
to it 可以替换成 to doing 还是 to do
sb was found后可以加do还是done,to do doing?