English verb conjugation
SHOULD INQUIRE

Regular verb: inquire - inquired - inquired

Affirmation

Simple form	V-ing form
I should inquire you should inquire he should inquire we should inquire you should inquire they should inquire	I should be inquiring you should be inquiring he should be inquiring we should be inquiring you should be inquiring they should be inquiring
Perfect	V-ing perfect
I should have inquired you should have inquired he should have inquired we should have inquired you should have inquired they should have inquired	I should have been inquiring you should have been inquiring he should have been inquiring we should have been inquiring you should have been inquiring they should have been inquiring

Negation

Simple form	V-ing form
I should not inquire you should not inquire he should not inquire we should not inquire you should not inquire they should not inquire	I should not be inquiring you should not be inquiring he should not be inquiring we should not be inquiring you should not be inquiring they should not be inquiring
Perfect	V-ing perfect
I should not have inquired you should not have inquired he should not have inquired we should not have inquired you should not have inquired they should not have inquired	I should not have been inquiring you should not have been inquiring he should not have been inquiring we should not have been inquiring you should not have been inquiring they should not have been inquiring

Interrogative form

Simple form	V-ing form
should I inquire? should you inquire? should he inquire? should we inquire? should you inquire? should they inquire?	should I be inquiring? should you be inquiring? should he be inquiring? should we be inquiring? should you be inquiring? should they be inquiring?
Perfect	V-ing perfect
should I have inquired? should you have inquired? should he have inquired? should we have inquired? should you have inquired? should they have inquired?	should I have been inquiring? should you have been inquiring? should he have been inquiring? should we have been inquiring? should you have been inquiring? should they have been inquiring?

Interro-negative form

Simple form	V-ing form
should I not inquire? should you not inquire? should he not inquire? should we not inquire? should you not inquire? should they not inquire?	should I not be inquiring? should you not be inquiring? should he not be inquiring? should we not be inquiring? should you not be inquiring? should they not be inquiring?
Perfect	V-ing perfect
should I not have inquired? should you not have inquired? should he not have inquired? should we not have inquired? should you not have inquired? should they not have inquired?	should I not have been inquiring? should you not have been inquiring? should he not have been inquiring? should we not have been inquiring? should you not have been inquiring? should they not have been inquiring?