the way to do 还是doing the key to do 还是doing 还是两个都可以,搞不懂,求解释

the way to do 还是doing the key to do 还是doing 还是两个都可以,搞不懂,求解释 the key to doing还是do? the key to 后加do还是 doing? the best time + to do 还是 doing on the way to do sth 还是on the way to doing sth way of+doing 还是to do? 初二英语我搞不懂词组后面应该加to do 还是 doing 还是do 怎么办? the best way to do sth is后加doing还是to do? think doing还是think to do 还是都可以? The trees need+ do/doing还是to do? 是begin to do还是begin doing 或是都可以? the method to do还是the method of doing?