English verb conjugation
CAN LECTURE

Regular verb: lecture - lectured - lectured

Affirmation

Simple form	V-ing form
I can lecture you can lecture he can lecture we can lecture you can lecture they can lecture	I can be lecturing you can be lecturing he can be lecturing we can be lecturing you can be lecturing they can be lecturing
Perfect	V-ing perfect
I can have lectured you can have lectured he can have lectured we can have lectured you can have lectured they can have lectured	I can have been lecturing you can have been lecturing he can have been lecturing we can have been lecturing you can have been lecturing they can have been lecturing

Negation

Simple form	V-ing form
I can't lecture you can't lecture he can't lecture we can't lecture you can't lecture they can't lecture	I can't be lecturing you can't be lecturing he can't be lecturing we can't be lecturing you can't be lecturing they can't be lecturing
Perfect	V-ing perfect
I can't have lectured you can't have lectured he can't have lectured we can't have lectured you can't have lectured they can't have lectured	I can't have been lecturing you can't have been lecturing he can't have been lecturing we can't have been lecturing you can't have been lecturing they can't have been lecturing

Interrogative form

Simple form	V-ing form
can I lecture? can you lecture? can he lecture? can we lecture? can you lecture? can they lecture?	can I be lecturing? can you be lecturing? can he be lecturing? can we be lecturing? can you be lecturing? can they be lecturing?
Perfect	V-ing perfect
can I have lectured? can you have lectured? can he have lectured? can we have lectured? can you have lectured? can they have lectured?	can I have been lecturing? can you have been lecturing? can he have been lecturing? can we have been lecturing? can you have been lecturing? can they have been lecturing?

Interro-negative form

Simple form	V-ing form
can't I lecture? can't you lecture? can't he lecture? can't we lecture? can't you lecture? can't they lecture?	can't I be lecturing? can't you be lecturing? can't he be lecturing? can't we be lecturing? can't you be lecturing? can't they be lecturing?
Perfect	V-ing perfect
can't I have lectured? can't you have lectured? can't he have lectured? can't we have lectured? can't you have lectured? can't they have lectured?	can't I have been lecturing? can't you have been lecturing? can't he have been lecturing? can't we have been lecturing? can't you have been lecturing? can't they have been lecturing?