Question

we heard of her failure (make its complex sentence)

Answer 1

the news about her failure was heard by us
I think so

Answer 2

We heard that she had failed. This sentence is changed into a complex sentence.

1. A complex sentence is a type of sentence that has one independent clause and also at least one dependent clause. This means that the clauses are not the same or equal, they always use coordinating conjunction that can change the rank of one or more of the clauses to make them less same or less equal.

For example- My Mother laughed when I told her a joke.

2. Right below I will show you a sentence where I am changing a simple sentence into a complex sentence-

Simple sentences:

Toddle ate a big pancake. He got stomach pain.

Complex sentences:

After Toddle ate a big pancake, he got stomach pain.