I could lecture you could lecture he could lecture we could lecture you could lecture they could lecture
Forma com V-ing
I could be lecturing you could be lecturing he could be lecturing we could be lecturing you could be lecturing they could be lecturing
Perfeito
I could have lectured you could have lectured he could have lectured we could have lectured you could have lectured they could have lectured
Perfeito com V-ing
I could have been lecturing you could have been lecturing he could have been lecturing we could have been lecturing you could have been lecturing they could have been lecturing
Negação
Forma simple
I couldn't lecture you couldn't lecture he couldn't lecture we couldn't lecture you couldn't lecture they couldn't lecture
Forma com V-ing
I couldn't be lecturing you couldn't be lecturing he couldn't be lecturing we couldn't be lecturing you couldn't be lecturing they couldn't be lecturing
Perfeito
I couldn't have lectured you couldn't have lectured he couldn't have lectured we couldn't have lectured you couldn't have lectured they couldn't have lectured
Perfeito com V-ing
I couldn't have been lecturing you couldn't have been lecturing he couldn't have been lecturing we couldn't have been lecturing you couldn't have been lecturing they couldn't have been lecturing
Forma interrogativa
Forma simple
could I lecture? could you lecture? could he lecture? could we lecture? could you lecture? could they lecture?
Forma com V-ing
could I be lecturing? could you be lecturing? could he be lecturing? could we be lecturing? could you be lecturing? could they be lecturing?
Perfeito
could I have lectured? could you have lectured? could he have lectured? could we have lectured? could you have lectured? could they have lectured?
Perfeito com V-ing
could I have been lecturing? could you have been lecturing? could he have been lecturing? could we have been lecturing? could you have been lecturing? could they have been lecturing?
Forma interro-Negação
Forma simple
couldn't I lecture? couldn't you lecture? couldn't he lecture? couldn't we lecture? couldn't you lecture? couldn't they lecture?
Forma com V-ing
couldn't I be lecturing? couldn't you be lecturing? couldn't he be lecturing? couldn't we be lecturing? couldn't you be lecturing? couldn't they be lecturing?
Perfeito
couldn't I have lectured? couldn't you have lectured? couldn't he have lectured? couldn't we have lectured? couldn't you have lectured? couldn't they have lectured?
Perfeito com V-ing
couldn't I have been lecturing? couldn't you have been lecturing? couldn't he have been lecturing? couldn't we have been lecturing? couldn't you have been lecturing? couldn't they have been lecturing?