English verb conjugation
SHOULD TESTIFY

Regular verb: testify - testified - testified

Affirmation

Simple form	V-ing form
I should testify you should testify he should testify we should testify you should testify they should testify	I should be testifying you should be testifying he should be testifying we should be testifying you should be testifying they should be testifying
Perfect	V-ing perfect
I should have testified you should have testified he should have testified we should have testified you should have testified they should have testified	I should have been testifying you should have been testifying he should have been testifying we should have been testifying you should have been testifying they should have been testifying

Negation

Simple form	V-ing form
I should not testify you should not testify he should not testify we should not testify you should not testify they should not testify	I should not be testifying you should not be testifying he should not be testifying we should not be testifying you should not be testifying they should not be testifying
Perfect	V-ing perfect
I should not have testified you should not have testified he should not have testified we should not have testified you should not have testified they should not have testified	I should not have been testifying you should not have been testifying he should not have been testifying we should not have been testifying you should not have been testifying they should not have been testifying

Interrogative form

Simple form	V-ing form
should I testify? should you testify? should he testify? should we testify? should you testify? should they testify?	should I be testifying? should you be testifying? should he be testifying? should we be testifying? should you be testifying? should they be testifying?
Perfect	V-ing perfect
should I have testified? should you have testified? should he have testified? should we have testified? should you have testified? should they have testified?	should I have been testifying? should you have been testifying? should he have been testifying? should we have been testifying? should you have been testifying? should they have been testifying?

Interro-negative form

Simple form	V-ing form
should I not testify? should you not testify? should he not testify? should we not testify? should you not testify? should they not testify?	should I not be testifying? should you not be testifying? should he not be testifying? should we not be testifying? should you not be testifying? should they not be testifying?
Perfect	V-ing perfect
should I not have testified? should you not have testified? should he not have testified? should we not have testified? should you not have testified? should they not have testified?	should I not have been testifying? should you not have been testifying? should he not have been testifying? should we not have been testifying? should you not have been testifying? should they not have been testifying?