为什么“It's helpful of you to help me clean the classroom”为什么要用helpful?

为什么“It's helpful of you to help me clean the classroom”为什么要用helpful? It‘s helpful to ___the words of English if you want to improve your English是m打头的 Sometimes it's not_to know the parts of a new word to understand it,but it will help you many timesSometimes it is not__ to know the parts of a new word to understand it,but it will help you many times.为什么要填enough?helpful和useful不可以 It's helpful to put children in a situation____they can see themselves differently.为什么用where而不用which. we find reading english stories helpful改为同义句it's helpful us?english It’s very helpful me to read English magaznes It's helpful ____(read) in the morning ----I'm sorry.That wasn't of much help.______.And it was most helpful.A.Thanks anywayB.Sure it was .C.Of course not.选哪个?为什么? It is helpful to 这里rule of thumb A helpful rule of thumb is put it where it isn't. A deposit in transit is on the company's books,but it isn't on the bank statement. it s helpful to read in the morning 改为同义句_ _ in the morning _ helpful Why do you think of the headmaster of your school?Oh,she is _____headmaster who is kind -hearted a nd helpful,And it”s ____pleasure to work with her A the the B a a C a the D the a选什么为什么 I'm sorry,That wasn't of much help.____,And it was most helpful.A.Thanks anyway.B.It doesn't matter C.Of course not D.Sure it was请问为什么? ——I'm sorry.That wasn't of much help.——________.And it was most helpful.A.Thanks anywayB.It doesn't matterC.Of course notD.Sure it wasD为什么翻译不, 1.It's hard but helpful to learn a foreign根据句意写出单词的正确形式.1.It's hard but helpful to learn a foreign Don'give up learning English it's helpful to you（同义句）Don't ___ ____ Eenglish,it's helpful to you. you are helpful和that's very kind of you的区别?---How are getting on with your cleaning?Do you need my help?---____,but I think I'm all right.A No,thanks B that's OK C you are helpful D that's very kind of you选哪个答案,为什么? 同义句改写:It's helpful for you to use some good ways to memorize things.