Lisa has been here for two hours.

[Alice Chu]

Please tell me if my understanding is correct.
1. Lisa has been here for two hours.
It means Lisa came two hours ago and she is still here.

2. Lisa has been coming here for two hours, but she is still on the way.
It means the action of coming started two hours ago and continues in the present.

3. Lisa is here with me. She came two hours ago.
It means the action of coming was completed two hours ago.

4. Lisa is here with me. She has come for two hours.
This sentence is wrong because the action of coming was completed and can’t continue.

 

[teechar]

Please tell me if my understanding is correct.
1. Lisa has been here for two hours.
It means Lisa came two hours ago and she is still here.

Right.

2. Lisa has been coming here for two hours, but she is still on the way.
It means the action of coming started two hours ago and continues in the present.

It means Lisa said, two hours before, that she was coming, but she still has not arrived.

3. Lisa is here with me. She came two hours ago.
It means the action of coming was completed two hours ago.

It means she arrived two hours before the time of speaking.

4. Lisa is here with me. She has come for two hours.
This sentence is wrong because the action of coming was completed and can’t continue.

No, you are wrong. That sentence is possible and quite natural. It means the (intended) duration of Lisa's visit is two hours.