1 are... doing-present continuous

visit- present simple

are leaving-- present continuous

2 have had lunch- present perfect

have been working- present perfect continuous

3 Do ..like- present simple

know- present simple

have never tried- present perfect

am thinking- present continuous

4 A) have been going- present perfect continuous

have not lost- present perfect

B) exercise- present simple

am- present simple

5 A) have been- present perfect

B) have known- present perfect

have been sharing- present perfect continuous

6 A) are- present simple

have gone- present perfect