Simple Past or Present Perfect
Simple Past or Past Perfect
Future Simple or Future Perfect
100
He ___ (live) there when he was a child.
He lived there when he was a child.
100
Samir ___(be) a doctor before he ___ (become) an accountant.
Samir was / had been a doctor before he became become an accountant.
100

By the time I'm 80 I ___________(retire)

will have retired

(a finished action in the future)

200
I ____ (not / see) her since last year.
I haven't seen her since last year.
200
I ___ (feel) a little better after I ___ (take) the medicine.
I felt a little better after I took / had taken the medicine.
200

When I'm older I ______ (study) in a foreign country.

will study

(a prediction/plan)

300
They ____ (leave) a few minutes ago.
They left a few minutes ago.
300
I was late. The teacher ___ (give, already) a quiz when I ___(get) to class.
I was late. The teacher had already given a quiz when I got to class.
300

Before the age of 40 my friend ___________(become) a millionaire.

will have become


(a finished achievement in the future)

400
The movie ____ (not, start ) yet.
The movie hasn't started yet.
400
It was raining hard, but by the time class ___(be) over, the rain ___ (stop).
It was raining hard, but by the time class was over, the rain had stopped.
400

At the end of class I _______ (switch off) the computer.

will switch off


(at = used to begin an action)

500
I ____ (gave up) smoking last year.
I gave up smoking last year.
500
Millions of years ago, dinosaurs ___ (walk) the earth, but they ___ (become) extinct by the time people first ___ (appear).
Millions of years ago, dinosaurs walked the earth, but they had become extinct by the time people first appeared.
500

By the end of class, I ________(practice)

will have practiced


(by = used for the end of an action)

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