Question

Скобки нужно разкрыть в Present Simple, Continuous, Perfect и Perfect Continuous.Дам балл: I ... (not to know) how long Henry ... (to work) on that project but he (not to finish) it yet​

Answer 1

Ответ:

I don't know [Present Simple] how long Henry has been working [Present Perfect Continuous] on this project, but he hasn't finished [Present Perfect] it yet.

Answer 2

I do not know how long Henry has been working on that project, but he has not finished it yet.