Question

(c) Conjunctions that refer to time are called Temporal Conjunctions; as -
when, before, after, while, until, till.
We never use will/shall in a clause that begins with a temporal conjunction
1. I'll stay here until you come back. ✓
I'll stay here until you will come back.)
2. I'll talk to you when I have time.
I'll talk to you when I will have time. (Ⓡ)
3. Please close the window before you go out.
Please close the window before you will go out. (*)
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Answer 1

Answer:

yes. this statement is right.