The future perfect — will have + past participle — is used to look forward to a point in the future and say that an action will already be finished by that point. It answers the question: 'Will this be done by then?' It is less common in everyday speech than will or going to, but it appears regularly in professional writing, formal announcements, and academic contexts. Teachers who understand the future perfect are better equipped to explain it when learners encounter it, and to use it accurately themselves in formal writing.
Before you start — think honestly about your own teaching and experience.
Look at the examples. Answer each question before reading the explanation — this is how your students will learn too.
The teacher is speaking now. Friday has not arrived. But she is talking about something that will be done before Friday. What does 'will have prepared' tell us about the relationship between the preparation and Friday?
'Will have prepared' tells us that the preparation will be completed before Friday arrives. The speaker is standing in the present, looking forward to Friday, and saying: at that future point, this action will already be in the past — it will be done. This is the core meaning of the future perfect: it connects the present moment to a future time and says that an action will be finished by then. The signal 'by then' (or 'by Friday', 'by next week', 'by the time you arrive') is the clearest indicator that future perfect is appropriate. Wherever you see 'by + future time', think future perfect.
In each sentence there are two time references: the present moment (when the speaker is talking) and a future point (by the end of term, by the time you read this, by 2030). What will be true at the future point in each sentence?
In each sentence, the future perfect describes something that will be completed before the future point mentioned. At the end of term, the studying of all four tenses will be done. By the time you read the message, the meeting will already be in progress or finished. By 2030, the twenty years of teaching will be complete. The future perfect looks forward from now to a future moment and says: by that point, this will already have happened. Signal words: by, by the time, by then, before, when (in some contexts). The future perfect is particularly common in formal writing and planning contexts because it deals with completion and deadlines.
Both sentences refer to marking books. Both are about the future. But the relationship to the future time point is completely different. Can you explain the difference clearly in your own words?
Future continuous — 'will be marking' — means the action will be in progress at 3 p.m. It started before 3 p.m. and is still ongoing at 3 p.m. The action is not finished. Future perfect — 'will have marked' — means the marking will be completely done before 3 p.m. At 3 p.m., the action is already in the past from that future perspective. This is the key contrast: in progress (future continuous) versus already completed (future perfect). The preposition tells you which to use: AT a time → often future continuous (what is happening then); BY a time → often future perfect (what will be done by then).'
| Tense / Form | Use / Meaning | Example | Key time words |
|---|---|---|---|
| Feature | Future perfect | Future continuous | |
| Form | will have + past participle | will be + verb-ing | |
| Meaning | Action completed before a future point | Action in progress at a future point | |
| Key signal | by, by the time, before, by then | at, at this time, while, when (ongoing) | |
| Example | By Friday, I will have marked all the books. | At 3 p.m., I will be marking the books. | |
| Question | Will you have finished by Monday? | Will you be working at 3 p.m.? | |
| Negative | She won't have finished by noon. | She won't be working at noon. |
FUTURE PERFECT CONTINUOUS
There is also a future perfect continuous form: will have been + verb-ing. This is used to describe an action that will have been in progress for a period of time before a future point. For example: 'By next year, she will have been teaching for twenty years.' This emphasises the duration of the activity up to the future point. It is relatively rare outside formal and academic writing and is not covered in depth in this lesson, but teachers should know it exists.
HOW COMMON IS THE FUTURE PERFECT?
The future perfect is less common in everyday informal speech than will, going to, or present continuous for the future. Native speakers often simplify: 'I'll be done by Friday' (using future continuous loosely) or 'It'll be finished by then' (simple will). However, in formal writing — reports, official communications, academic text — the future perfect is regularly used and expected. Teachers who write formally, or who support learners with formal writing, benefit from being comfortable with it.
IRREGULAR PAST PARTICIPLES IN FUTURE PERFECT
Because future perfect uses the past participle, learners need to know irregular participles: go → gone, write → written, give → given, take → taken, do → done, see → seen, come → come, read → read, teach → taught, bring → brought. A common error is using the simple past form instead: 'I will have went' (should be 'gone'), 'she will have wrote' (should be 'written'). This error is the same as in the present and past perfect — the root cause is not knowing the past participle.
FUTURE PERFECT OR FUTURE CONTINUOUS? - Is the action completed before the future time point? → Future perfect (will have + past participle). - Is the action in progress at the future time point? → Future continuous (will be + verb-ing). - Do you see 'by', 'by the time', 'before', 'by then'? → Future perfect is likely needed. - Do you see 'at', 'at this time', 'while', 'when' (describing simultaneous action)? → Future continuous is likely needed. - Is the verb irregular? → Check the past participle form carefully (gone, written, given — not went, wrote, gave).
Choose the correct form — future perfect or future continuous — for each sentence.
Each sentence has one error. Write the correct sentence and explain the mistake.
Use this sequence directly in class — guided discovery, no textbook needed. Tap each step to mark it done.
STEP 1 — LOOK FORWARD TO FRIDAY (6 minutes): Ask learners to think about their working week. Ask: 'What will you have done by Friday that you have not yet done today?' Give them two minutes to think. Take three or four responses and write them on the board: 'By Friday, I will have marked all the tests.' 'By Friday, I will have written my lesson plans for next week.' Underline 'will have + past participle'. Ask: 'Is this finished now? No. Will it be finished by Friday? Yes — that's what will have means.'
STEP 2 — BY OR AT? (8 minutes): Write 'by 3 p.m.' and 'at 3 p.m.' on the board. Ask learners: 'If I say BY 3 p.m., does the action happen before 3 p.m. or during 3 p.m.? If I say AT 3 p.m., is the action in the middle of happening at that moment, or already done?' Establish the contrast clearly. Then write four sentences — two with 'by' and two with 'at' — and ask learners to choose future perfect or future continuous for each.
STEP 3 — PAST PARTICIPLE CHECK (6 minutes): Future perfect depends on knowing past participles. Quickly review the past participles of ten common irregular verbs: go, write, give, take, do, see, teach, bring, finish, prepare. Ask learners to produce the past participle for each. Correct any errors — especially 'went', 'wrote', 'gave' used instead of 'gone', 'written', 'given'.
STEP 4 — DEADLINE SENTENCES (8 minutes): Give learners three upcoming deadlines — real or invented school-related ones. Ask them to write a future perfect sentence for each: what will have been completed before that deadline? Share with a partner and check the form. Focus especially on past participle accuracy and the 'by + time' signal.
STEP 5 — FUTURE PERFECT VS FUTURE CONTINUOUS CONTRAST (7 minutes): Write four sentence frames on the board — two that need 'at' (future continuous) and two that need 'by' (future perfect). Ask learners to complete each sentence using the correct form. Discuss any that cause disagreement. End with a clear summary of the AT versus BY rule.
Use directly in class — copy, adapt, or read aloud. No printing needed.
For each strategy, choose the option that best describes where you are now.
Your feedback helps other teachers and helps us improve TeachAnyClass.