By doing these simple things,we surely can go out of the door happily and come back home safe every这个句子中come back home safe 里面的safe做什么成分,修饰动词不是应该用副词吗?

by doing It is ______ to examine these questions carefully by doing more group discussions.选项:a、worthy learn by doing. 是什么意思? learning by doing Learn by doing “by doing this one What are these people doing?的中文翻译 what am I doing these days what are yuo doing these days?回答! ain't doing nothing these days learn by doing中by的意思 learn by doing 的音标 learn by doing的解释 make a living by doing 解释do sth by doing confuse sb by/with doing I learned by doing things By getting down___ all these jobs,we can certainly overcome all the difficulties facing usA to do B doing C to doing D do再问一个：to什么时候用作介词.什么时候用成不定式?