| singular | plural |
| Infinitive | | |
| forecast | |
| present simple | | |
| 1 | I forecast | we forecast |
| 2 | you forecast | you forecast |
| 3 | he/she/it forecasts | they forecast |
| past simple | | |
| 1 | I forecast | we forecast |
| 2 | you forecast | you forecast |
| 3 | he/she/it forecast | they forecast |
| future simple | | |
| 1 | I will/shall forecast | we will/shall forecast |
| 2 | you will/shall forecast | you will/shall forecast |
| 3 | he/she/it will/shall forecast | they will/shall forecast |
| conditional simple | | |
| 1 | I would forecast | we would forecast |
| 2 | you would forecast | you would forecast |
| 3 | he/she/it would forecast | they would forecast |
| present continuous | | |
| 1 | I am forecasting | we are forecasting |
| 2 | you are forecasting | you are forecasting |
| 3 | he/she/it is forecasting | they are forecasting |
| past continuous | | |
| 1 | I was forecasting | we were forecasting |
| 2 | you were forecasting | you were forecasting |
| 3 | he/she/it was forecasting | they were forecasting |
| future continuous | | |
| 1 | I will be forecasting | we will be forecasting |
| 2 | you will be forecasting | you will be forecasting |
| 3 | he/she/it will be forecasting | they will be forecasting |
| conditional continuous | | |
| 1 | I would be forecasting | we would be forecasting |
| 2 | you would be forecasting | you would be forecasting |
| 3 | he/she/it would be forecasting | they would be forecasting |
| present perfect | | |
| 1 | I have forecast | we have forecast |
| 2 | you have forecast | you have forecast |
| 3 | he/she/it has forecast | they have forecast |
| past perfect | | |
| 1 | I had forecast | we had forecast |
| 2 | you had forecast | you had forecast |
| 3 | he/she/it had forecast | they had forecast |
| future perfect | | |
| 1 | I will have forecast | we will have forecast |
| 2 | you will have forecast | you will have forecast |
| 3 | he/she/it will have forecast | they will have forecast |
| conditional perfect | | |
| 1 | I would have forecast | we would have forecast |
| 2 | you would have forecast | you would have forecast |
| 3 | he/she/it would have forecast | they would have forecast |
