I could lecture you could lecture she could lecture we could lecture you could lecture they could lecture
Forma con V-ing
I could be lecturing you could be lecturing she could be lecturing we could be lecturing you could be lecturing they could be lecturing
Perfecto
I could have lectured you could have lectured she could have lectured we could have lectured you could have lectured they could have lectured
Perfecto con V-ing
I could have been lecturing you could have been lecturing she could have been lecturing we could have been lecturing you could have been lecturing they could have been lecturing
Negación
Forma simple
I couldn't lecture you couldn't lecture she couldn't lecture we couldn't lecture you couldn't lecture they couldn't lecture
Forma con V-ing
I couldn't be lecturing you couldn't be lecturing she couldn't be lecturing we couldn't be lecturing you couldn't be lecturing they couldn't be lecturing
Perfecto
I couldn't have lectured you couldn't have lectured she couldn't have lectured we couldn't have lectured you couldn't have lectured they couldn't have lectured
Perfecto con V-ing
I couldn't have been lecturing you couldn't have been lecturing she 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 she lecture? could we lecture? could you lecture? could they lecture?
Forma con V-ing
could I be lecturing? could you be lecturing? could she be lecturing? could we be lecturing? could you be lecturing? could they be lecturing?
Perfecto
could I have lectured? could you have lectured? could she have lectured? could we have lectured? could you have lectured? could they have lectured?
Perfecto con V-ing
could I have been lecturing? could you have been lecturing? could she have been lecturing? could we have been lecturing? could you have been lecturing? could they have been lecturing?
Forma interro-negativa
Forma simple
couldn't I lecture? couldn't you lecture? couldn't she lecture? couldn't we lecture? couldn't you lecture? couldn't they lecture?
Forma con V-ing
couldn't I be lecturing? couldn't you be lecturing? couldn't she be lecturing? couldn't we be lecturing? couldn't you be lecturing? couldn't they be lecturing?
Perfecto
couldn't I have lectured? couldn't you have lectured? couldn't she have lectured? couldn't we have lectured? couldn't you have lectured? couldn't they have lectured?
Perfecto con V-ing
couldn't I have been lecturing? couldn't you have been lecturing? couldn't she have been lecturing? couldn't we have been lecturing? couldn't you have been lecturing? couldn't they have been lecturing?