What__________ you ________(do) with my keys? - I haven't seen your keys
What have you done with my keys? - I haven't seen your keys
How long ________he _______ (see) her? - Not long, but they're getting married next month.
How long has he been seeing her? - Not long, but they're getting married next month.
How many exams ___you____(have) this week?
5, and I´ve still got 2 more to do.
Teacher to student: Why ___________you __________(do) your homework lately? You need to start doing it.
Teacher to student: Why haven´t you been doing your homework lately? You need to start doing it.
I _________ (have) piano lessons for over 10 years and I'm still not very good.
I've been having piano lessons for over 10 years and I'm still not very good.
They __________ (build) the new road around the school for several years.
They have been building the new road around the school for several years.
How many biscuits __________you _______ (eat) today?
How many biscuits have you eaten?
Why are you crying? - I ______ (cut) onions.
Why are you crying? - I've been cutting onions.
She ________ (study) for days. She hasn´t left her room all week.
She has been studying for days. She hasn´t left her room all week..
I______ (have) this computer for over 10 years.
I've had this computer for over 10 years.
She _________ (already / write) six letters this morning.
She has written six letters this morning.
How long ________you __________ (know) her?
How long have you known her?