What are some other time expressions commonly used to indicate the future perfect tense?

In addition to the basic time expression "by [specific time or date]", there are several other time expressions commonly used to indicate the future perfect tense. These include:

1. "In [specific period of time]": This expression is used to indicate that an action will be completed before a certain period of time in the future. For example, "In five years, I will have graduated from college."

2. "By the time [specific event] happens": This expression is used to indicate that an action will be completed before a particular event occurs. For instance, "By the time she arrives, I will have finished cooking dinner."

3. "Before [specific time or event]": This expression is used to indicate that an action will be completed prior to a certain time or event. For example, "I will have completed my assignment before the deadline."

4. "By [specific point in the future]": This expression is used to indicate that an action will be completed before a specific point in the future. For instance, "I will have saved enough money by next year to buy a new car."

5. "When [specific condition] is met": This expression is used to indicate that an action will be completed when a specific condition is fulfilled. For example, "When I have finished my work, I will have earned a break."

6. "Once [specific action] is completed": This expression is used to indicate that an action will be completed once another action is finished. For instance, "Once I have finished studying, I will have learned all the necessary material."

These time expressions help to provide context and clarity when discussing actions that will be completed in the future perfect tense. It is important to choose the appropriate time expression based on the specific context and intended meaning of the sentence.