is后面为什么可以跟to,是固定搭配还是?这个是原句,还有希望帮我翻译下.Older people must be given more chances to learn if they are to contribute to society rather than be a financial burden,according to a new study on populat

词组固定搭配be unfair 后面是跟for 还是to我觉得是for is后面为什么可以跟to,是固定搭配还是?这个是原句,还有希望帮我翻译下.Older people must be given more chances to learn if they are to contribute to society rather than be a financial burden,according to a new study on populat He was frozen to death 一般来说to后面应该跟动词啊,为什么这里是名词death,是固定搭配吗? 英语：what are you listening to?为什么后面要加上一个to listen to 是个一个固定搭配，如果不加to，我觉得也可以呀？ My father is always the first to get up and the last to goto bed.为什么在the first后面加to?也就是说这个是固定搭配？ sb find it + adj + to do sth 为什么It 后面不加is呢·~我知道是固定搭配,可是为什么呢· 英语句子中的指示代词（ this that these those )后面跟什么词?是名词么?那Please take these to your mother 就不行喽？these those和are this that和is是固定搭配么？ the book is of great value里面 of是否可以省略 和后面的great 是固定搭配吗 告诉我动词后面跟动词是加动词不定式还是动名词我主要是要知道那些固定搭配,而不是to do 和doing意思不同的动词有什么规律么 The astronauts succeeded_______from the moon to the earth according to the plan.A.in returningB.in returning back我知道succeed in 并且介词后面跟ing 但是为什么不能加back?难道是固定搭配? 英语中.除固定搭配外,动词后面可以跟介词吗? be generous的固定搭配,是to ,还是for air is to us ___ water is to fish 为什么填what 固定搭配air is to us ___ water is to fish为什么填what 固定搭配?. You are belong to sb . 为什么you 后面要加be 的?You are belong to me . belong不是属于动词吗?那 be 不是应该加doing的形式才对吗? 还是这是固定的搭配啊? be busy doing是busy的一个搭配,句子中is是谓语动词,busy是形容词,cooking是动名词我还是不太能理解cooking为什么要用动名词,是因为这是个固定搭配么,什么类型的固定搭配? closeness to nature,closeness to 是固定词组吗，还是固定搭配， I don't even get a chance to speak to them中的to是介词 为什么后面的speak不用加ing?是固定搭配的原因吗 I think that Thailand is a good place to 后面是 跟going 还是 go 为什么RT