simple present

personal pronoun	Aussagesatz	negation	question:
I	I am 'm	am not 'm not	Am I?
he/she/it	is 's	is not isn't	Is he/she/it?
we/you/they	are 're	are not aren't	Are we/you/they?

the simple past

personal pronoun	Aussagesatz	negation	question:
I/he/she/it	was	was not wasn't	Was I/he/she/it ?
we/you/they	were	were not weren't	Were we/you/they?

present perfect

personal pronoun	Aussagesatz	negation	question:
I/we/you/they	have been 've been	have not been haven't been	Have I/we/you/they been?
he/she/it	has been 's been	has not been hasn't been	Has he/she/it been?

past perfect

personal pronoun	Aussagesatz	negation	question:
I/he/she/it we/you/they	had been 'd been	had not been hadn't been	Had I/he/she/it been? we/you/they been?

will future

personal pronoun	Aussagesatz	negation	question:
I/he/she/it we/you/they	will be 'll be	will not be won't be	Will I/he/she/it we/you/they be?

exercises - to be