He worked out the answer. It was clever of him.

It was clever of him to worked out the answer

Marie always pays her bills regularly. She's careful that way.

Marie is always careful in paying her bills.

He was crossing the road. I caught sight of him.

I noticed him to cross the road.

When we finally heard that David had arrived, we were very relieved.

We were relieved to hear that David had arrived.

Why have you thrown up your job? You're mad.

You are mad at thrown up your job.

Jim got into his car and drove away. I saw this.

I saw Jim got into his car and drove away.

It's disappointing that we havent heard from Molly.

We are...

Contacting her at work is usually quite easy.

She is easy to contact her at work.

The house shook violently and all of us felt that.

All of us felt that the house shook violently.

Can you sign the papers please? They are ready now.

The papers are ready for you to sign now.
I have made corrections in bold and underlined some other problems:

It was clever of him to worked out the answer

Marie is always careful to pay her bills regularly.

I caught sight of him to cross the road.

We were relieved to hear that David had finally arrived.

You are mad at thrown up your job.

I saw Jim got into his car and drove away.

We are disappointed that...

She is easy to contact her at work.

All of us felt the house shook violently.
It was clever of him to work out the answer
You are mad at throw up your job.
I saw Jim got into his car and driven away.
It is easy to contact her at work.
Right?
Students: We have free audio pronunciation exercises.
Still wrong:

You are mad at throw up your job.
I saw Jim got into his car and driven away.
You are mad to throw up your job.
I saw Jim get into his car and drive away.
Right!
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