English verb conjugation
SHOULD ENQUIRE

Regular verb: enquire - enquired - enquired

Affirmation

Simple form	V-ing form
I should enquire you should enquire he should enquire we should enquire you should enquire they should enquire	I should be enquiring you should be enquiring he should be enquiring we should be enquiring you should be enquiring they should be enquiring
Perfect	V-ing perfect
I should have enquired you should have enquired he should have enquired we should have enquired you should have enquired they should have enquired	I should have been enquiring you should have been enquiring he should have been enquiring we should have been enquiring you should have been enquiring they should have been enquiring

Negation

Simple form	V-ing form
I should not enquire you should not enquire he should not enquire we should not enquire you should not enquire they should not enquire	I should not be enquiring you should not be enquiring he should not be enquiring we should not be enquiring you should not be enquiring they should not be enquiring
Perfect	V-ing perfect
I should not have enquired you should not have enquired he should not have enquired we should not have enquired you should not have enquired they should not have enquired	I should not have been enquiring you should not have been enquiring he should not have been enquiring we should not have been enquiring you should not have been enquiring they should not have been enquiring

Interrogative form

Simple form	V-ing form
should I enquire? should you enquire? should he enquire? should we enquire? should you enquire? should they enquire?	should I be enquiring? should you be enquiring? should he be enquiring? should we be enquiring? should you be enquiring? should they be enquiring?
Perfect	V-ing perfect
should I have enquired? should you have enquired? should he have enquired? should we have enquired? should you have enquired? should they have enquired?	should I have been enquiring? should you have been enquiring? should he have been enquiring? should we have been enquiring? should you have been enquiring? should they have been enquiring?

Interro-negative form

Simple form	V-ing form
should I not enquire? should you not enquire? should he not enquire? should we not enquire? should you not enquire? should they not enquire?	should I not be enquiring? should you not be enquiring? should he not be enquiring? should we not be enquiring? should you not be enquiring? should they not be enquiring?
Perfect	V-ing perfect
should I not have enquired? should you not have enquired? should he not have enquired? should we not have enquired? should you not have enquired? should they not have enquired?	should I not have been enquiring? should you not have been enquiring? should he not have been enquiring? should we not have been enquiring? should you not have been enquiring? should they not have been enquiring?