| Aspect | Future Perfect Simple | Future Perfect Continuous |
|---|---|---|
| Structure | Subject + will have + past participle | Subject + will have been + present participle |
| Duration | Emphasizes completion of an action at a specific point in the future | Emphasizes the duration of an action leading up to a specific point in the future |
| Completed Action | Focuses on the completion of an action | Focuses on the ongoing nature of an action leading up to a specific point in the future |
| Examples | By next year, I will have finished my degree. | By next year, I will have been studying for four years. |
| Usage |
Used for actions that will be completed by a specific point in time in the future |
Used for actions that will be ongoing and eventually completed by a specific point in time in the future |
| Emphasis | Emphasizes the completion of an action | Emphasizes the ongoing nature of an action |
