Question

She was at his side when he was working in the garden (Simple)​

Answer 1

Answer:

She worked beside him in the garden.  

Explanation:

A simple sentence is made up of only one clause. It has just one subject and one predicate.  

Example  

Flowers are beautiful.  

Reading novels is one of the greatest pleasures in my life.

A complex sentence has one independent and one or more dependent clauses. The clauses in a complex sentence can be in any order. If the dependent clause is first, a comma is usually after it.

Answer 2

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She worked beside him in the garden.