I did them.

I did it.

I had them made.

I have made them.

He has eaten them.

He had eaten them.

He ate them.

He eats them.

I didn't see it.

I don't see it.

I had not seen it.

I haven't seen it.

I haven't had any time.

I hadn't had any time.

I didn't have any time.

I don't have any time.

What are you doing?

What's to be done?

What had you done?

What have you done?

Has he gone to the shop?

Had he gone to the shop?

Is he going to the shop?

Is he in the shop?

We go out.

We have gone out.

We had gone out.

We went out.

We don't take the keys.

We didn't take the keys.

We hadn't taken the keys.

We haven't taken the keys.

What had you done with the keys?

What have you done with the keys?

What did you do with the keys?

What do you do with the keys?

have + verbin 3. muoto

have + verbin 2. muoto

have + verbin 1. muoto

had + verbin 3. muoto

eat

ate

eaten

have + verbin 2. muoto

had + verbin 2. muoto

have + verbin 3. muoto

had + verbin 3. muoto