Indicative
Present Indefinite
I improve upon
you improve upon
he/she/it improves upon
we improve upon
you improve upon
they improve upon
Present Continuous
I am improving upon
you are improving upon
he/she/it is improving upon
we are improving upon
you are improving upon
they are improving upon
Present Perfect
I have improved upon
you have improved upon
he/she/it has improved upon
we have improved upon
you have improved upon
they have improved upon
Present Perfect Continuous
I have been improving upon
you have been improving upon
he/she/it has been improving upon
we have been improving upon
you have been improving upon
they have been improving upon
Past Indefinite
I improved upon
you improved upon
he/she/it improved upon
we improved upon
you improved upon
they improved upon
Past Continuous
I was improving upon
you were improving upon
he/she/it was improving upon
we were improving upon
you were improving upon
they were improving upon
Past Perfect
I had improved upon
you had improved upon
he/she/it had improved upon
we had improved upon
you had improved upon
they had improved upon
Past Perfect Continuous
I had been improving upon
you had been improving upon
he/she/it had been improving upon
we had been improving upon
you had been improving upon
they had been improving upon
Future Indefinite
I will improve upon
you will improve upon
he/she/it will improve upon
we will improve upon
you will improve upon
they will improve upon
Future Continuous
I will be improving upon
you will be improving upon
he/she/it will be improving upon
we will be improving upon
you will be improving upon
they will be improving upon
Future Perfect
I will have improved upon
you will have improved upon
he/she/it will have improved upon
we will have improved upon
you will have improved upon
they will have improved upon
Future Perfect Continuous
I will have been improving upon
you will have been improving upon
he/she/it will have been improving upon
we will have been improving upon
you will have been improving upon
they will have been improving upon
Conditional
Conditional Present
I would improve upon
you would improve upon
he/she/it would improve upon
we would improve upon
you would improve upon
they would improve upon
Conditional Present Continuous
I would be improving upon
you would be improving upon
he/she/it would be improving upon
we would be improving upon
you would be improving upon
they would be improving upon
Conditional Perfect
I would have improved upon
you would have improved upon
he/she/it would have improved upon
we would have improved upon
you would have improved upon
they would have improved upon
Conditional Perfect Continuous
I would have been improving upon
you would have been improving upon
he/she/it would have been improving upon
we would have been improving upon
you would have been improving upon
they would have been improving upon