摘要：door的意思是“门，出入门；门口”，它指由建筑物内通往户外的门，或者建筑物内部一个房间通往另一个房间的门，可以是金属的，玻璃的。还可以指门框上装有可以开关的门扇。比如：

door、gate和entrance都表示进口的门 但具体使用时是有不同的。

1.door的意思是“门，出入门；门口”，它指由建筑物内通往户外的门，或者建筑物内部一个房间通往另一个房间的门，可以是金属的，玻璃的。还可以指门框上装有可以开关的门扇。比如：

Close the door behind you, please.请随手关门。The door closed behind him.他一出门，门就关上了。I saw one door had been blocked up.我看到一扇门被封死了。I heard the door close.我听到门关上了。

The door is marked "Private."门上写着“闲人免进”。The top door opened outward.最上面的门向外开着。There's someone at the door.门口有个人。

2.gate的意思是“大门，出入口；大门口”，指院落、土地四周围墙上的门，一般都是比较结实并带有门栓的门。比如：

He opened the gate and smilingly welcomed the travellers home.他打开大门，微笑着欢迎游客归来。

Are you sure you locked the gate? You could easily have forgotten.你肯定锁上大门了吗？你很可能是忘了。

Just make sure you shut the gate.你务必关上那幢大门。They stopped to lean over a gate.他们停下来，将身子从一个栅栏门上面探出去。

The police checked IDs at the gate.警察在大门口查看身份证件。

3.entrance是一个正式用语，它的意思是“入口”，但不具体指门或者大门，是笼统的指入口处。比如：

This entrance is in constant use.此入口经常使用。The entrance hall is littered with toys.入口大厅里散落着玩具。

They rushed the entrance and forced their way in.他们冲向了入口并强行闯了进去。Make sure you park your car clear of the entrance.切莫把车停在入口处。

The entrance was camouflaged with bricks and dirt.入口处用砖块和泥土伪装了起来。There were people at the entrance giving out leaflets.有人在入口处发传单。

来源：小千课堂