catching 在这句话中If you put it off until the end of the week or until right before a test you will have too much CATCHING UP to do.文中it代doing homework.顺便解释下为什么用了进行时,这样怎么就是不可属名词了呢?

catching 在这句话中If you put it off until the end of the week or until right before a test you will have too much CATCHING UP to do.文中it代doing homework.顺便解释下为什么用了进行时,这样怎么就是不可属名词了呢? if you are catching a train,you__comfortably early than.A.will be better to beB.had better be 这句话中为什么选b,不选A if you are catching a train,you__comfortably early than.A.will be better to beB.had better be 这句话中为什么选b,不选A If you are catching a train,it is always better to be comfortably early than even a fraction ofa minute too late,这句话怎样翻译 If you are catching a train,it is always better to be comfortably early than even a fraction ofa minute too late这句话中的better后的to 是什么用法? you're catching on what+if引导的条件从句是否可以用在虚拟语气中?What would you do if you had a million dollars?这句话可否改为:What if you had a million dollars? If you should change your mind,do let me know.虚拟语气在这句话中是怎么体现的? if you have difficulty making a decision,call your parents for advice.在这句话中为什么用“making? Catching the ball,John.请问这句话哪里错了? 英语翻译在这里catching 关于if i want和if i wanted区别i would have to take unpaid leave if i want to study full-time.you could do that in eighteen months if you wanted.在这两句话中,为什么一个用了if i want而另一个却用了if i wanted,是不是i 英语 if引导的条件状语从句中可以有现在进行时吗,if you watch tv now,you will not finish the homework在这句话中有now,为什么还要用一般现在时 为什么在 I often fish for hours without catching anything中catching是without的宾语?...为什么在 I often fish for hours without catching anything中catching是without的宾语?宾语应该是动作承受者呀. BE动词和助动词在这句话中的用法疑问.课本上的语句是：why isn't Mrs.lee's cat catching the mice?可catching应该是动词,理论语句应该用助动词don't/dosen't如下：why dose't Mrs.lee's cat catching the mice?到底哪 catching. catching Instead of catching fish,they catch old boots and rubbish.这句话中catch为什么要用动词原形为什么catch后面不加es