I should tickle you should tickle he should tickle we should tickle you should tickle they should tickle
V-ing form
I should be tickling you should be tickling he should be tickling we should be tickling you should be tickling they should be tickling
Perfect
I should have tickled you should have tickled he should have tickled we should have tickled you should have tickled they should have tickled
V-ing perfect
I should have been tickling you should have been tickling he should have been tickling we should have been tickling you should have been tickling they should have been tickling
Negation
Simple form
I should not tickle you should not tickle he should not tickle we should not tickle you should not tickle they should not tickle
V-ing form
I should not be tickling you should not be tickling he should not be tickling we should not be tickling you should not be tickling they should not be tickling
Perfect
I should not have tickled you should not have tickled he should not have tickled we should not have tickled you should not have tickled they should not have tickled
V-ing perfect
I should not have been tickling you should not have been tickling he should not have been tickling we should not have been tickling you should not have been tickling they should not have been tickling
Interrogative form
Simple form
should I tickle? should you tickle? should he tickle? should we tickle? should you tickle? should they tickle?
V-ing form
should I be tickling? should you be tickling? should he be tickling? should we be tickling? should you be tickling? should they be tickling?
Perfect
should I have tickled? should you have tickled? should he have tickled? should we have tickled? should you have tickled? should they have tickled?
V-ing perfect
should I have been tickling? should you have been tickling? should he have been tickling? should we have been tickling? should you have been tickling? should they have been tickling?
Interro-negative form
Simple form
should I not tickle? should you not tickle? should he not tickle? should we not tickle? should you not tickle? should they not tickle?
V-ing form
should I not be tickling? should you not be tickling? should he not be tickling? should we not be tickling? should you not be tickling? should they not be tickling?
Perfect
should I not have tickled? should you not have tickled? should he not have tickled? should we not have tickled? should you not have tickled? should they not have tickled?
V-ing perfect
should I not have been tickling? should you not have been tickling? should he not have been tickling? should we not have been tickling? should you not have been tickling? should they not have been tickling?