Question

wait here till I come back ( identify the clause and it's function)​

Answer 1

Answer:

Till I come back

Explanation:

Wait here till I come back. Here – till I come back, is an adverbial clause of time. I shall be late as I have a meeting. Here – as I have a meeting, is an adverbial clause of reason.

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Answer 2

Answer:

'till I come back' is the subordinating clause.

It is used to tell the time he/she will come back