六年级英语语法知识汇总一、词类:1、 动词:行为动词、be动词、情态动词。(1)行为动词原形、+s/es、+ed、+ing,具体判断方法如下:(2)be动词a、Am-was Is -was Are-were 口诀:我用am, 你用are, is用在他她它,所有复数全用are。b、肯定和否定句 I am (not) from London. He /She is(not) a teacher. My hair is(not) long. Her eyes are(not) small. c、 一般疑问句 Am I ? Yes, you are. /No, you arent. Are you/they? Yes,we/ they are. No,we/ they arent. Is the cat fat? Yes, it is. /No, it isnt. is、am、are为一类,一般用于一般现在时、现在进行时和一般将来时中。was和were为另一类,一般用于一般过去时