English verb conjugation
CAN SOURCE

Regular verb: source - sourced - sourced

Affirmation

Simple form	V-ing form
I can source you can source he can source we can source you can source they can source	I can be sourcing you can be sourcing he can be sourcing we can be sourcing you can be sourcing they can be sourcing
Perfect	V-ing perfect
I can have sourced you can have sourced he can have sourced we can have sourced you can have sourced they can have sourced	I can have been sourcing you can have been sourcing he can have been sourcing we can have been sourcing you can have been sourcing they can have been sourcing

Negation

Simple form	V-ing form
I cannot source you cannot source he cannot source we cannot source you cannot source they cannot source	I cannot be sourcing you cannot be sourcing he cannot be sourcing we cannot be sourcing you cannot be sourcing they cannot be sourcing
Perfect	V-ing perfect
I cannot have sourced you cannot have sourced he cannot have sourced we cannot have sourced you cannot have sourced they cannot have sourced	I cannot have been sourcing you cannot have been sourcing he cannot have been sourcing we cannot have been sourcing you cannot have been sourcing they cannot have been sourcing

Interrogative form

Simple form	V-ing form
can I source? can you source? can he source? can we source? can you source? can they source?	can I be sourcing? can you be sourcing? can he be sourcing? can we be sourcing? can you be sourcing? can they be sourcing?
Perfect	V-ing perfect
can I have sourced? can you have sourced? can he have sourced? can we have sourced? can you have sourced? can they have sourced?	can I have been sourcing? can you have been sourcing? can he have been sourcing? can we have been sourcing? can you have been sourcing? can they have been sourcing?

Interro-negative form

Simple form	V-ing form
can I not source? can you not source? can he not source? can we not source? can you not source? can they not source?	can I not be sourcing? can you not be sourcing? can he not be sourcing? can we not be sourcing? can you not be sourcing? can they not be sourcing?
Perfect	V-ing perfect
can I not have sourced? can you not have sourced? can he not have sourced? can we not have sourced? can you not have sourced? can they not have sourced?	can I not have been sourcing? can you not have been sourcing? can he not have been sourcing? can we not have been sourcing? can you not have been sourcing? can they not have been sourcing?