English verb conjugation CAN STEM

Regular verb: stem - stemmed - stemmed

Affirmation

Simple form

I can stem
you can stem
he can stem
we can stem
you can stem
they can stem

V-ing form

I can be stemming
you can be stemming
he can be stemming
we can be stemming
you can be stemming
they can be stemming

Perfect

I can have stemmed
you can have stemmed
he can have stemmed
we can have stemmed
you can have stemmed
they can have stemmed

V-ing perfect

I can have been stemming
you can have been stemming
he can have been stemming
we can have been stemming
you can have been stemming
they can have been stemming

Negation

Simple form

I cannot stem
you cannot stem
he cannot stem
we cannot stem
you cannot stem
they cannot stem

V-ing form

I cannot be stemming
you cannot be stemming
he cannot be stemming
we cannot be stemming
you cannot be stemming
they cannot be stemming

Perfect

I cannot have stemmed
you cannot have stemmed
he cannot have stemmed
we cannot have stemmed
you cannot have stemmed
they cannot have stemmed

V-ing perfect

I cannot have been stemming
you cannot have been stemming
he cannot have been stemming
we cannot have been stemming
you cannot have been stemming
they cannot have been stemming

Interrogative form

Simple form

can I stem?
can you stem?
can he stem?
can we stem?
can you stem?
can they stem?

V-ing form

can I be stemming?
can you be stemming?
can he be stemming?
can we be stemming?
can you be stemming?
can they be stemming?

Perfect

can I have stemmed?
can you have stemmed?
can he have stemmed?
can we have stemmed?
can you have stemmed?
can they have stemmed?

V-ing perfect

can I have been stemming?
can you have been stemming?
can he have been stemming?
can we have been stemming?
can you have been stemming?
can they have been stemming?

Interro-negative form

Simple form

can I not stem?
can you not stem?
can he not stem?
can we not stem?
can you not stem?
can they not stem?

V-ing form

can I not be stemming?
can you not be stemming?
can he not be stemming?
can we not be stemming?
can you not be stemming?
can they not be stemming?

Perfect

can I not have stemmed?
can you not have stemmed?
can he not have stemmed?
can we not have stemmed?
can you not have stemmed?
can they not have stemmed?

V-ing perfect

can I not have been stemming?
can you not have been stemming?
can he not have been stemming?
can we not have been stemming?
can you not have been stemming?
can they not have been stemming?

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