it's boring的意思是“真无聊”,但为什么要在前面加一个it's?it's在这里有什么作用?

it's boring的意思是“真无聊”,但为什么要在前面加一个it's?it's在这里有什么作用? It's too boring和It's very boring 意思是一样的吗? It's too boring it`s joan`s这里joan的后面为什么要加s It's+been++a+long+time.been在这里起什么作用?为什么要用been i think it's kind of boring的意思 it's so boring everday 英语口语语法“It's much in fashion this summer”为什么in在前面啊?我理解的是“it's it\'s什么意思 it's gone,这里的it‘s是it has 还是it is? It's raining again. It在这里指什么意义? I think it's boring的否定句 He thinks it's boring的否定句