Question

this is an old building.i lived here for many years(into complex
sentence)​

Answer 1

Answer:

this is the old building I lived here for many years

Answer 2

Answer:

tɦɨֆ ɨֆ tɦɛ old ɮʊɨʟɖɨռɢ աɦɛʀɛ ɨ ʟɨʋɛɖ ʄօʀ ʍǟռʏ ʏɛǟʀֆ

Explanation:

A Complex Sentence consists of one principal clause and any number of subordinate clauses.

A Noun Clause is a subordinate clause which does the work of a noun in a complex sentence.