Let's open the door noww为什么有now,动词还用原型

Let's open the door!的主语 let ___[i] open the door ,please. Let's open the door noww为什么有now,动词还用原型 Let the window closed,keep the door open否定句 let him_____(open) the door _____应添什么 Let him open the door.（改成否定句 Open the door,please. open the door please,-------- ---------? Leave the door open. Let's go and have ____ swim._____ it time _____ the man ______ go home?The door ______ the room is open.You can come in. He's trying_____ out,please open the door. lt's cold._____（open,close）the door,please. The door was open,but now it's l____ 判断对错：1.Not open the door.是祈使句否定句.2.Let's sing and dance.是祈使句.3.We are going to swimming It's really____for you to open the door if a stranger knocks at the door let's open our 用反意疑问句完成句子{英]You dislike this kind of music ,( Your parents seldom go to the cinema,( That's unfair,( Nothing can stop him,( Open the door,( Let us have a rest,( Let's go,( Everybody knows the key,( 祈使句的反义疑问句Let me take you out.Open the door.怎么改反义疑问句?