It must be obvious — the problem itself is.Awhat

It must be obvious — the problem itself is.Awhat It’s obvious what your problem is ----------------the problem may be ,we must solve it ourselv The problem is very difficult .You must think it over ------ 比如it must be obvious中的it就是形式主语那么it is good也是形式主语吗?如何区分it是不是形 it is obvious It is obvious that.. It is necessary that the problem be settled at once. the problem itself 中itself做什么成分 The problem is very difficult .You must think about it caref A computer _____ think itself,it must be told what to do.A d A computer____think for itself ; it must be told what to do.