Indicative
Present Indefinite
I check up on
you check up on
he/she/it checks up on
we check up on
you check up on
they check up on
Present Continuous
I am checking up on
you are checking up on
he/she/it is checking up on
we are checking up on
you are checking up on
they are checking up on
Present Perfect
I have checked up on
you have checked up on
he/she/it has checked up on
we have checked up on
you have checked up on
they have checked up on
Present Perfect Continuous
I have been checking up on
you have been checking up on
he/she/it has been checking up on
we have been checking up on
you have been checking up on
they have been checking up on
Past Indefinite
I checked up on
you checked up on
he/she/it checked up on
we checked up on
you checked up on
they checked up on
Past Continuous
I was checking up on
you were checking up on
he/she/it was checking up on
we were checking up on
you were checking up on
they were checking up on
Past Perfect
I had checked up on
you had checked up on
he/she/it had checked up on
we had checked up on
you had checked up on
they had checked up on
Past Perfect Continuous
I had been checking up on
you had been checking up on
he/she/it had been checking up on
we had been checking up on
you had been checking up on
they had been checking up on
Future Indefinite
I will check up on
you will check up on
he/she/it will check up on
we will check up on
you will check up on
they will check up on
Future Continuous
I will be checking up on
you will be checking up on
he/she/it will be checking up on
we will be checking up on
you will be checking up on
they will be checking up on
Future Perfect
I will have checked up on
you will have checked up on
he/she/it will have checked up on
we will have checked up on
you will have checked up on
they will have checked up on
Future Perfect Continuous
I will have been checking up on
you will have been checking up on
he/she/it will have been checking up on
we will have been checking up on
you will have been checking up on
they will have been checking up on
Conditional
Conditional Present
I would check up on
you would check up on
he/she/it would check up on
we would check up on
you would check up on
they would check up on
Conditional Present Continuous
I would be checking up on
you would be checking up on
he/she/it would be checking up on
we would be checking up on
you would be checking up on
they would be checking up on
Conditional Perfect
I would have checked up on
you would have checked up on
he/she/it would have checked up on
we would have checked up on
you would have checked up on
they would have checked up on
Conditional Perfect Continuous
I would have been checking up on
you would have been checking up on
he/she/it would have been checking up on
we would have been checking up on
you would have been checking up on
they would have been checking up on