| Present Simple - Настоящее время |
| Вопросительная форма | Утвердительная форма | Отрицательная форма |
| Do I contribute? | I contribute | I don't contribute |
| Does he contribute? | He contributes | He doesn't contribute |
| Does she contribute? | She contributes | She doesn't contribute |
| Does it contribute? | It contributes | It doesn't contribute |
| Do you contribute? | You contribute | You don't contribute |
| Do we contribute? | We contribute | We don't contribute |
| Do they contribute? | They contribute | They don't contribute |
| Past Simple - Прощедщее время |
| Вопросительная форма | Утвердительная форма | Отрицательная форма |
| Did I contribute? | I contributed | I didn’t contribute |
| Did he contribute? | He contributed | He didn’t contribute |
| Did she contribute? | She contributed | She didn’t contribute |
| Did it contribute? | It contributed | It didn’t contribute |
| Did we contribute? | We contributed | We didn’t contribute |
| Did you contribute? | You contributed | You didn’t contribute |
| Did they contribute? | They contributed | They didn’t contribute |
| Future Simple - Будущее время |
| Вопросительная форма | Утвердительная форма | Отрицательная форма |
| Will I contribute? | I will contribute | I won’t contribute |
| Will he contribute? | He will contribute | He won’t contribute |
| Will she contribute? | She will contribute | She won’t contribute |
| Will it contribute? | It will contribute | It won’t contribute |
| Will we contribute? | We will contribute | We won’t contribute |
| Will you contribute? | You will contribute | You won’t contribute |
| Will they contribute? | They will contribute | They won’t contribute |
