英语is.are.do的区别
2个回答

is are是be动词,do是助动词.is是单数第三人称的be动词,he, she, your friend.等第三人称.如:he is your friend.are是第二人称单数以及复数的be动词,they ,we,you,.等如:you are my friend,do如,i do love you、do you know me.等等.