they need to be out in the wild doing 为什么用doing 不用to do整句是这样：they need to be out in the wild doing what they are supposed to be doing,问的是第一个doing,为什么用doing不用to do,是什么语法?

what do people need to take when they go out they need to be out in the wild doing 为什么用doing 不用to do整句是这样：they need to be out in the wild doing what they are supposed to be doing,问的是第一个doing,为什么用doing不用to do,是什么语法? You need be over 13 to fill out this People need to be careful when they shop online. I suppose they must be trying out new ideas in the lab的反义疑问句为什么是need not they? all need to be large or XL sizes except for the pink and they need to be small/med help fill out the information they need to wire the money. 翻译It's tough out of there.They need to get an edge,I guess. I need to go out they set out to need to be down need to be they need to be able to speak english so that they can talk to one another翻译 翻译一下这句话～They reach to our need to be with and communicate with people. the windows are broken and need to be repaired i think so.They can hardly————the cold nowA give outB take outC keep outD put out 我想知道为什么 could you tell me()? A what do i need to care aboutAwhat do i need to care aboutBwhat they are talking with mr liCwhy he hates to be like othersDif he is good enough to go out of hospital 顺便问一下he is ready to help others anytime 还是any ti The weather ____ fine,they decided to go out for a walk.为什么括号里不能填to be 而是填being；to be a winner,you need to give all you have and try your best,为什么这里又可以填to be呢?不是主动地成为胜利者吗? the experiment they had devoted themselves to （be） turned out a failure? 要be 吗?