English verb conjugation
TO CONTRIBUTE

Regular verb: contribute - contributed - contributed

Indicative

Present	Present continuous	Preterite	Preterite continuous
do I not contribute? do you not contribute? does he not contribute? do we not contribute? do you not contribute? do they not contribute?	am I not contributing? are you not contributing? is he not contributing? are we not contributing? are you not contributing? are they not contributing?	did I not contribute? did you not contribute? did he not contribute? did we not contribute? did you not contribute? did they not contribute?	was I not contributing? were you not contributing? was he not contributing? were we not contributing? were you not contributing? were they not contributing?
Present perfect	Present perfect continuous	Pluperfect	Pluperfect continuous
have I not contributed? have you not contributed? has he not contributed? have we not contributed? have you not contributed? have they not contributed?	have I not been contributing? have you not been contributing? has he not been contributing? have we not been contributing? have you not been contributing? have they not been contributing?	had I not contributed? had you not contributed? had he not contributed? had we not contributed? had you not contributed? had they not contributed?	had I not been contributing? had you not been contributing? had he not been contributing? had we not been contributing? had you not been contributing? had they not been contributing?
Future	Future continuous	Future perfect	Future perfect continuous
will I not contribute? will you not contribute? will he not contribute? will we not contribute? will you not contribute? will they not contribute?	will I not be contributing? will you not be contributing? will he not be contributing? will we not be contributing? will you not be contributing? will they not be contributing?	will I not have contributed? will you not have contributed? will he not have contributed? will we not have contributed? will you not have contributed? will they not have contributed?	will I not have been contributing? will you not have been contributing? will he not have been contributing? will we not have been contributing? will you not have been contributing? will they not have been contributing?

Conditional

Present	Present continuous	Past	Past continuous
would I not contribute? would you not contribute? would he not contribute? would we not contribute? would you not contribute? would they not contribute?	would I not be contributing? would you not be contributing? would he not be contributing? would we not be contributing? would you not be contributing? would they not be contributing?	would I not have contributed? would you not have contributed? would he not have contributed? would we not have contributed? would you not have contributed? would they not have contributed?	would I not have been contributing? would you not have been contributing? would he not have been contributing? would we not have been contributing? would you not have been contributing? would they not have been contributing?

Infinitive

Imperative

Infinitive		Imperative
to contribute		- - -

Participle

Present	Past
contributing	contributed