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