初中英语中有哪些单词只能加to do哪些只能加doing,哪些既可以加todo又...答:confirm , justify , substantiate , endorse , favor , encourage , shirk , shun , bar , prohibit , hinder , impede , omit , overlook , foresee , predict , contemplate , care for , put off ,can’t help , can’t stand , leave off , insist on , persist in , th...