Question

"I cannot start the car. The battery has run down" -Combine into a complex sentence

Answer 1

i cannot start the car because the battery has run down

Answer 2

Hello friend

Here's your answer

A complex sentence is a sentence that has a main clause and a dependent clause

So the complex sentence will be

I cannot start the car as the battery has run down.

Here the main clause is cannot start the car

Dependent clause is battery has run down.