Identify its start and the future checkpoint up to which it will continue.
Future Perfect Continuous: Duration by a Future Time
Use the future perfect continuous to measure how long an activity will have continued by a future checkpoint.
Future Perfect Continuous
UseMeasure the duration of an activity continuing up to a future point and interpret the likely effect of that duration.
Core formsubject + will have been + verb-ing
Duration frameby + future point · for + accumulated duration
RememberChoose the future perfect simple for a completed quantity or result; choose the continuous for accumulated activity or duration.
ชื่อไวยากรณ์ภาษาไทย — เปิดเมื่อจำเป็น
Future Perfect Continuous ใช้บอกว่าเมื่อถึงจุดหนึ่งในอนาคต กิจกรรมจะดำเนินมานานเท่าไร โครงสร้าง will have been + กริยา-ing และมักใช้ by ร่วมกับ for
Your goal
By the end of this lesson, you can forecast three accumulated activity durations, contrast completed output with continuing workload, explain two likely effects, and recommend one capacity change.
คำอธิบายเป้าหมายภาษาไทย — เปิดเมื่อจำเป็น
บทนี้ฝึกคาดการณ์ระยะเวลาสะสมของกิจกรรมเมื่อถึงจุดในอนาคต แยกจากผลลัพธ์ที่เสร็จแล้ว และใช้ข้อมูลนั้นประเมินภาระงานหรือความพร้อม
Progress focus LCFP
LC · Language Control
Control the target pattern so the intended meaning remains clear.
Control the target pattern so the intended meaning remains clear.
FP · Functional Performance
Complete the lesson’s real communication outcome without teacher-supplied sentences.
Complete the lesson’s real communication outcome without teacher-supplied sentences.
Your grammar path
Use will have been plus verb-ing with a for-duration phrase.
Explain what the accumulated activity means for energy, capacity, experience, or performance.
30-minute lesson route
3 minDuration-forecast baseline
5 minWill have been + -ing
5 minOutput or activity focus
6 minListen and calculate
7 minCapacity forecast
4 minFeedback and retry
Locate start and future checkpoint
Use three long projects, routines, or responsibilities. Calculate the accumulated duration at the chosen future point.
How to run Stage 1
3 min: Establish three activities, starts, and future checkpoints.
Build will have been plus verb-ing
Use for plus accumulated duration and practise question forms such as How long will they have been working?
How to run Stage 2
5 min: Build future-perfect-continuous statements and duration questions.
Contrast continuous duration with completed output
Engduo Audio: Listen for meaning first. Audio never starts automatically.
Separate accumulated activity, completed output, likely effect, and recommendation.
Identify duration, completed results, continuing relationships, and forecast conclusion.
Compare will have been working for twelve hours with will have answered 200 questions. State which meaning the speaker needs.
How to run Stage 3
5 min: Contrast accumulated activity with completed output.
Recover duration, output, and effect
Listen to both forecasts. Record the start, checkpoint, accumulated activity, completed result, and likely consequence.
How to run Stage 4
6 min: Play both forecasts and recover duration, output, and effect.
Deliver a capacity forecast
Forecast three activities at a future checkpoint. Use two future-perfect-continuous forms, one future-perfect-simple result, two effects, and one capacity recommendation.
How to run Stage 5
7 min: Run the capacity forecast and recommendation.
Final practice: Forecast how long an activity will have continued
Task: Give a two-minute capacity forecast with three activities, two accumulated durations, one completed output, two likely effects, and one recommendation.
Success: The forms clearly separate accumulated activity from completed result and the recommendation responds to the forecast effect.
LC · Language Control
0 Frequent form problems obscure the intended meaning.
1 Meaning remains clear with some prompting or self-correction.
2 Controls will have been + verb-ing and distinguishes duration focus from completed-output focus.
FP · Functional Performance
0 Does not yet complete the communication outcome.
1 Completes most of the outcome with visible prompts.
2 Interprets future duration and makes a justified capacity recommendation independently.
How to run Stage 6
4 min: Score LC and FP, repair one duration or focus choice, and retry the recommendation.
คำอธิบายภาษาไทย — เปิดเมื่อจำเป็นเท่านั้น
วางจุดเริ่มและจุดในอนาคตแล้วคำนวณระยะเวลาที่กิจกรรมจะดำเนินมาถึงตอนนั้น หากเน้นระยะเวลาหรือภาระที่ต่อเนื่องใช้ will have been + -ing แต่ถ้าเน้นจำนวนงานที่เสร็จใช้ Future Perfect Simple
Continue your learning path
Teaching references
CEFR Companion Volume — used for communication outcomes and observable progress.
Content and media rights
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