could diminish
Verbo regular: diminish - diminished- diminished

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could diminish
you could diminish
he could diminish
we could diminish
you could diminish
they could diminish 	I could be diminishing
you could be diminishing
he could be diminishing
we could be diminishing
you could be diminishing
they could be diminishing	I could have diminished
you could have diminished
he could have diminished
we could have diminished
you could have diminished
they could have diminished	I could have been diminishing
you could have been diminishing
he could have been diminishing
we could have been diminishing
you could have been diminishing
they could have been diminishing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not diminish
you could not diminish
he could not diminish
we could not diminish
you could not diminish
they could not diminish 	I could not be diminishing
you could not be diminishing
he could not be diminishing
we could not be diminishing
you could not be diminishing
they could not be diminishing	I could not have diminished
you could not have diminished
he could not have diminished
we could not have diminished
you could not have diminished
they could not have diminished	I could not have been diminishing
you could not have been diminishing
he could not have been diminishing
we could not have been diminishing
you could not have been diminishing
they could not have been diminishing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I diminish?
could you diminish?
could he diminish?
could we diminish?
could you diminish?
could they diminish? 	could I be diminishing?
could you be diminishing?
could he be diminishing?
could we be diminishing?
could you be diminishing?
could they be diminishing? 	could I have diminished?
could you have diminished?
could he have diminished?
could we have diminished?
could you have diminished?
could they have diminished? 	could I have been diminishing?
could you have been diminishing?
could he have been diminishing?
could we have been diminishing?
could you have been diminishing?
could they have been diminishing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not diminish?
could you not diminish?
could he not diminish?
could we not diminish?
could you not diminish?
could they not diminish? 	could I not be diminishing?
could you not be diminishing?
could he not be diminishing?
could we not be diminishing?
could you not be diminishing?
could they not be diminishing? 	could I not have diminished?
could you not have diminished?
could he not have diminished?
could we not have diminished?
could you not have diminished?
could they not have diminished? 	could I not have been diminishing?
could you not have been diminishing?
could he not have been diminishing?
could we not have been diminishing?
could you not have been diminishing?
could they not have been diminishing?