to contribute
Regular verb: contribute - contributed- contributed

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I contribute
you contribute
he contributes
we contribute
you contribute
they contribute 	Iamcontributing
youarecontributing
heiscontributing
wearecontributing
youarecontributing
theyarecontributing	I contributed
you contributed
he contributed
we contributed
you contributed
they contributed	Iwascontributing
youwerecontributing
hewascontributing
wewerecontributing
youwerecontributing
theywerecontributing	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I have contributed
you have contributed
he has contributed
we have contributed
you have contributed
they have contributed	I have been contributing
you have been contributing
hehasbeen contributing
we have been contributing
you have been contributing
they have been contributing	I had contributed
you had contributed
he had contributed
we had contributed
you had contributed
they had contributed	I had been contributing
you had been contributing
he had been contributing
we had been contributing
you had been contributing
they had been contributing	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I will contribute
you will contribute
he will contribute
we will contribute
you will contribute
they will contribute 	I will be contributing
you will be contributing
he will be contributing
we will be contributing
you will be contributing
they will be contributing	I will have contributed
you will have contributed
he will have contributed
we will have contributed
you will have contributed
they will have contributed	I will have been contributing
you will have been contributing
he will have been contributing
we will have been contributing
you will have been contributing
they will have been contributing	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I would contribute
you would contribute
he would contribute
we would contribute
you would contribute
they would contribute 	I would be contributing
you would be contributing
he would be contributing
we would be contributing
you would be contributing
they would be contributing	I would have contributed
you would have contributed
he would have contributed
we would have contributed
you would have contributed
they would have contributed	I would have been contributing
you would have been contributing
he would have been contributing
we would have been contributing
you would have been contributing
they would have been contributing	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to contribute 	 	contribute
Let's contribute
contribute 	 	

Participle 	
Present 	Past 	 	 	
contributing	contributed