
Verbo regular: contribute - contributed - contributed
Presente | Presente contínuo | Pretérito | Preterito contínuo | 
|  do I contribute? do you contribute? does he contribute? do we contribute? do you contribute? do they contribute?  |  am I contributing? are you contributing? is he contributing? are we contributing? are you contributing? are they contributing?  | did I contribute? did you contribute? did he contribute? did we contribute? did you contribute? did they contribute?  |  was I contributing? were you contributing? was he contributing? were we contributing? were you contributing? were they contributing?  | 
Presente perfeito | Presente perfeito contínuo | Mais perfeito | Contínuo mais perfeito | 
|  have I contributed? have you contributed? has he contributed? have we contributed? have you contributed? have they contributed?  |  have I been contributing? have you been contributing? has he been contributing? have we been contributing? have you been contributing? have they been contributing?  | had I contributed? had you contributed? had he contributed? had we contributed? had you contributed? had they contributed?  | had I been contributing? had you been contributing? had he been contributing? had we been contributing? had you been contributing? had they been contributing?  | 
Futuro | Futuro contínuo | futuro perfeito | futuro perfeito contínuo | 
|  will I contribute? will you contribute? will he contribute? will we contribute? will you contribute? will they contribute?  |  will I be contributing? will you be contributing? will he be contributing? will we be contributing? will you be contributing? will they be contributing?  |  will I have contributed? will you have contributed? will he have contributed? will we have contributed? will you have contributed? will they have contributed?  |  will I have been contributing? will you have been contributing? will he have been contributing? will we have been contributing? will you have been contributing? will they have been contributing?  | 
Presente | Presente contínuo | Passado | Passado contínuo | 
|  would I contribute? would you contribute? would he contribute? would we contribute? would you contribute? would they contribute?  |  would I be contributing? would you be contributing? would he be contributing? would we be contributing? would you be contributing? would they be contributing?  |  would I have contributed? would you have contributed? would he have contributed? would we have contributed? would you have contributed? would they have contributed?  |  would I have been contributing? would you have been contributing? would he have been contributing? would we have been contributing? would you have been contributing? would they have been contributing?  | 
Infinitivo | Imperativo | 
Infinitivo | Imperativo | ||
| to contribute | - - -  | 
Presente | Passado | ||
| contributing | contributed |