what he did has added to our difficulties为什么用现在完成时

what he did has added to our difficulties为什么用现在完成时 what he did has added to out difficulties.这个句子里面OUT是什么意思?还有分 What he did has added to our diffcatties.意思是 他所做的事增加了我们的困难 The snowstorm added to our difficulties.为什么要加to,add是及物动词呀 为什么Barely___time to catch the bus.用did he has? He added some words to explain his idea.为什么不用add面用added Added to our 现在完成时he has come to my house? 英语翻译Success added to our pleasure Successfully added to our He has no time to do what he likes为什么用to do What difficulties did the colonists face? what did he want to know that we could finish our work.A.whe