Question

How selfish I have been! (Make it assertive)​

Answer 1

Answer:

I had been very selfish.

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Answer 2

I had been so selfish is the assertive sentence.

A statement of facts is referred to as an assertion. It's a confident remark that's backed up with evidence. Declarative sentences are sometimes known as assertive sentences. These are used to provide information, make a statement, or make an allegation.