Question

Wait here till my arrival (simple sentence to complex sentence)

Answer 1

Wait here for my arrival.

A Complex sentence usually consist of a main Clause (independent sentence) and a subordinate clause(depends on Main Clause for complete meaning)

From the given Simple sentence,

we can write a complex sentence.

Here, Wait here is a Main Clause

and for my arrival is a subordinate clause as it has no complete meaning

Hope It Helps !!!!