English verb conjugation
SHOULD GNASH

Regular verb: gnash - gnashed - gnashed

Affirmation

Simple form	V-ing form
I should gnash you should gnash he should gnash we should gnash you should gnash they should gnash	I should be gnashing you should be gnashing he should be gnashing we should be gnashing you should be gnashing they should be gnashing
Perfect	V-ing perfect
I should have gnashed you should have gnashed he should have gnashed we should have gnashed you should have gnashed they should have gnashed	I should have been gnashing you should have been gnashing he should have been gnashing we should have been gnashing you should have been gnashing they should have been gnashing

Negation

Simple form	V-ing form
I should not gnash you should not gnash he should not gnash we should not gnash you should not gnash they should not gnash	I should not be gnashing you should not be gnashing he should not be gnashing we should not be gnashing you should not be gnashing they should not be gnashing
Perfect	V-ing perfect
I should not have gnashed you should not have gnashed he should not have gnashed we should not have gnashed you should not have gnashed they should not have gnashed	I should not have been gnashing you should not have been gnashing he should not have been gnashing we should not have been gnashing you should not have been gnashing they should not have been gnashing

Interrogative form

Simple form	V-ing form
should I gnash? should you gnash? should he gnash? should we gnash? should you gnash? should they gnash?	should I be gnashing? should you be gnashing? should he be gnashing? should we be gnashing? should you be gnashing? should they be gnashing?
Perfect	V-ing perfect
should I have gnashed? should you have gnashed? should he have gnashed? should we have gnashed? should you have gnashed? should they have gnashed?	should I have been gnashing? should you have been gnashing? should he have been gnashing? should we have been gnashing? should you have been gnashing? should they have been gnashing?

Interro-negative form

Simple form	V-ing form
should I not gnash? should you not gnash? should he not gnash? should we not gnash? should you not gnash? should they not gnash?	should I not be gnashing? should you not be gnashing? should he not be gnashing? should we not be gnashing? should you not be gnashing? should they not be gnashing?
Perfect	V-ing perfect
should I not have gnashed? should you not have gnashed? should he not have gnashed? should we not have gnashed? should you not have gnashed? should they not have gnashed?	should I not have been gnashing? should you not have been gnashing? should he not have been gnashing? should we not have been gnashing? should you not have been gnashing? should they not have been gnashing?