Words that make sentences

There are some important words that make sentences. for example,

He is very wealthy and lives in fear of his children being kidnapped.

The word * Being * shows the real idea of the sentence. Can anyone please tell me what are more important words that make these kind of sentences. I always have problem with these words.

How to make my idea strong related to these words?

Sorry, your question makes no sense to me. I don’t understand how “being” shows the “real idea of the sentence”, and I also don’t understand what you mean by “important words that make sentences”. In most sentences most words are “important”.