Укажите время глаголов в предложениях
1. they are discussing an important question 2. He works in the library 3. He is a very experienced teacher 4. I have known him since 1940
Помогите, кому не трудно))

1. They are discussing an important question - Present Continuous 2. He works in the library. - Present Simple 3. He is a very experienced teacher. - Present Simple 4. I have known him since 1940. - Present Perfect

1 present progressive 2 present simple 3 present simple 4 present perfect