His existence is important to me.

He was abusing his power.

I went to the market accompanied by my mother.

If you rephrase that complex theory in simpler terms, it's just common sense.

He daringly accepted the challenge.

The tree is the biggest tree in the park.

Please attach this file to the email.

My father is engaged in the livestock industry.

My younger brother is good at addition in arithmetic.

His thought is deep.