Question

I (wait) for two hours.but she has not come yet.​

Answer 1

I has been waiting for two hours but she didnt came yet

Answer 2

The correct sentence is:

I have been waiting for two hours but she has not come yet.

* The given sentence is in the present tense.

* The verb selected for the blank is 'have been waiting' which is present perfect continuous.

* It is used for describing actions that have started in the past and is still continuing/just stopped.

* The structure of a present perfect continuous tense is:

Subject+ auxiliary have+ auxiliary be+ main verb