1. Let's go in.
- Let's go inside.
- Let's go into the classroom.
- Go on in.
- Go in and sit down.
- I'll open/unlock the door and let you in.
2. Come in and sit down.
- Come in and take your seat.
- Come on/along in, ....name....
- In you come now, ....name....
- (Come) this way, please.
- Close the door (properly) behind you.
- Please don't slam/bang the door.
- You can leave the door open.
Supaphorn 3EN 040