be
been
I/be/to Madagascar.
I've been to Madagascar.
I/not see/him since last Monday.
I haven't seen him since last Friday.
you/ever/call/for an ambulance.
Have you ever called for an ambulance?
keep
kept
They/read/the hobbit/twice.
They've read Hobbit twice.
I/not watch/my favorite/series/lately.
I haven't seen much of Sarah lately.
Have/ever/be/San Francisco
Have you ever been to San Francisco?
become
become
They/be married/for/fifty years.
They've been married for fifty years
I/not do/too many stupid things in my life.
I haven't done too many stupid things in my life.
how long/he/be/a teacher?
How long has he been a teacher?
grow
grown
I/know/you/ 15 years, but/I/never/hear/you/speak/like that before
I've known you for 15 years, but I've never heard you speak like that before.
He/not be/unemployed/ since he left school.
He has not been unemployed since he left school.
How long/she/study/there
How long has she studied there?
forget
forgotten
She/never/tell/me/why/she/was/so/upset
She has just reminded me we have been married for 10 years.
I/never/meet/his wife.
I have never met his wife
Have/ever/see/ghost
Have you ever seen a ghost?