Theoretically, I'm doing math.

What do you think I've been doing?

Doing math is the only socially acceptable way to masturbate in public.

If we knew what we were doing, it wouldn't be called research, would it?

If you see a man approaching you with the obvious intention of doing you good, you should run for your life.

For once in my life I'm doing a good deed... And it is useless.

What have you been doing all this time!

Have you finished doing your homework yet?

What are you doing?

What ever are you doing here?

Are you doing what you think is right?

You have no business doing it.

Listen, um, I was wondering, what are you and Molly doing tonight?

I don't blame you for doing that.

You are doing well for a cub reporter.

We're doing the same old routine: going bar hopping and then to karaoke.

The holidays seem to be doing her health good.

I'm quite agreeable to doing my duty.

I admit this may not be the best way of doing it.

Each person has his own way of doing things.

On the whole, my company is doing well now.

More than ever do we need goals or leading ideas that will give purpose to whatever we are doing.

Whatever you're doing, starting off on the right foot is essential.

What do you think you're doing?

In doing anything, do your best.

What's my book doing here?

Are you doing anything special?

If you say that you cannot help doing something, you mean you cannot prevent or avoid it.

Whatever is worth doing at all, is worth doing well.

Whatever is worth doing at all, is worth doing well.

What were you doing when it began to rain?

The rain didn't stop them from doing their job.

What on earth are you doing here?

What on earth are you doing in my room?

What the devil are you doing?

What on earth are you doing?

What are you doing so hard?

Don't commit yourself to doing it within a week.

I was weary of doing the same thing over and over again.

I have hopes of doing well in that business.

You are doing very well. Keep it up.

I wonder if you don't get tired of doing the same thing every day.

There are a lot of ways of doing it.

If she's not careful she'll tear a ligament doing that.

You won't catch me doing that again.

Mary always assists her boyfriend in doing his assignments.

Mayuko avoided doing hard work.

Don't look away idly; just pay attention to what you're doing.

Mr White is doing very well so far.

You should be on your guard when doing business with strangers.

In doing anything, you must do your best.

He asked me what I had been doing.

If a thing is worth doing it is worth doing badly.

If a thing is worth doing it is worth doing badly.

What's this chair doing here?

One must be careful in doing anything.

Tom is doing well in his lessons at school.

What is Tony doing?

What are you doing that for?

How are you doing?

Rather than doing any good, the rain did a great deal of harm to the crop.

Most students are doing preparation for the term examination.

There is no advantage in doing that.

I never thought he was capable of doing something so cruel.

Give me a reason for doing such a thing.

What is the good of doing it?

If it is worth doing, do it well.

What is the harm in doing that?

It was for anyone who wanted to know what he and other scientists were doing.

This is the only possible time for doing that.

The hospital was barred from doing business for three years.

What was she doing when she made that blunder?

What were you doing then?

Cooperate with your friends in doing the work.

Other than that, I've been doing well.

I was not conscious what in fact I was doing then.

I can't help doing that.

You will gain nothing from doing that.

You must be doing wonderfully in everything.

What have you been doing?

What is John doing now?

Little Johnny what are you doing sitting here laughing?

Jane has been doing her assignment.

Sam, what are you doing?

Computers are capable of doing very complicated work in a split second.

Computers are capable of doing extremely complicated work.

Hi, Mimi! How are you doing?

What on earth are you doing in such a lonely place?

Will you give me your reasons for doing this?

In doing this, we cannot dispense with his help.

What's the point of doing this?

You can't be too careful when doing this experiment.

What are you doing here?

You can get an idea what we are doing here soon.

The coach accused us of not doing our best.

What's Ken doing now?

Clara is doing quite a job.

How are you doing these days?

What are you doing, Dad?

How are you and your wife doing, now that the birds have all flown the coop?

Hey, you! What are you doing?