English verb conjugation
SHOULD TUNNEL

Regular verb: tunnel - tunnelled - tunnelled

Affirmation

Simple form	V-ing form
I should tunnel you should tunnel he should tunnel we should tunnel you should tunnel they should tunnel	I should be tunnelling you should be tunnelling he should be tunnelling we should be tunnelling you should be tunnelling they should be tunnelling
Perfect	V-ing perfect
I should have tunnelled you should have tunnelled he should have tunnelled we should have tunnelled you should have tunnelled they should have tunnelled	I should have been tunnelling you should have been tunnelling he should have been tunnelling we should have been tunnelling you should have been tunnelling they should have been tunnelling

Negation

Simple form	V-ing form
I should not tunnel you should not tunnel he should not tunnel we should not tunnel you should not tunnel they should not tunnel	I should not be tunnelling you should not be tunnelling he should not be tunnelling we should not be tunnelling you should not be tunnelling they should not be tunnelling
Perfect	V-ing perfect
I should not have tunnelled you should not have tunnelled he should not have tunnelled we should not have tunnelled you should not have tunnelled they should not have tunnelled	I should not have been tunnelling you should not have been tunnelling he should not have been tunnelling we should not have been tunnelling you should not have been tunnelling they should not have been tunnelling

Interrogative form

Simple form	V-ing form
should I tunnel? should you tunnel? should he tunnel? should we tunnel? should you tunnel? should they tunnel?	should I be tunnelling? should you be tunnelling? should he be tunnelling? should we be tunnelling? should you be tunnelling? should they be tunnelling?
Perfect	V-ing perfect
should I have tunnelled? should you have tunnelled? should he have tunnelled? should we have tunnelled? should you have tunnelled? should they have tunnelled?	should I have been tunnelling? should you have been tunnelling? should he have been tunnelling? should we have been tunnelling? should you have been tunnelling? should they have been tunnelling?

Interro-negative form

Simple form	V-ing form
should I not tunnel? should you not tunnel? should he not tunnel? should we not tunnel? should you not tunnel? should they not tunnel?	should I not be tunnelling? should you not be tunnelling? should he not be tunnelling? should we not be tunnelling? should you not be tunnelling? should they not be tunnelling?
Perfect	V-ing perfect
should I not have tunnelled? should you not have tunnelled? should he not have tunnelled? should we not have tunnelled? should you not have tunnelled? should they not have tunnelled?	should I not have been tunnelling? should you not have been tunnelling? should he not have been tunnelling? should we not have been tunnelling? should you not have been tunnelling? should they not have been tunnelling?