We use the ... to show the length of an action.
We use the ... to show the result of an action.
We need to know the irregular verbs for ...
Present Perfect Continuous denotes an action which ...
In some cases these two tenses are interchangeable (any of them can be used):
Which of these three sentences is NOT correct?
Створюйте онлайн-тести
для контролю знань і залучення учнів
до активної роботи у класі та вдома