Mary doesn’t see the sight. She can’t tell you about that.

• Điều kiện loại 1: If Mary sees the sight, she can tell you about it.
• Điều kiện loại 2: If Mary saw the sight, she could tell you about it.

It wasn’t fine yesterday. We didn’t go for a walk.

• Điều kiện loại 1: If it is fine tomorrow, we will go for a walk.
• Điều kiện loại 2: If it had been fine yesterday, we would have gone for a walk.

I saw it with my own eyes. I believed it.

• Điều kiện loại 1: If I see it with my own eyes, I will believe it.
• Điều kiện loại 2: If I had not seen it with my own eyes, I would not have believed it.

The accident happened because the driver didn’t see the stop sign.

• Điều kiện loại 1: If the driver does not see the stop sign, an accident will happen.
• Điều kiện loại 2: If the driver had seen the stop sign, the accident would not have happened.

You can’t come late or they won’t let you in.

• Điều kiện loại 1: If you come late, they won’t let you in.
• Điều kiện loại 2: If you came on time, they would let you in.

I don’t know Greek, so I can’t tell you about that.

• Điều kiện loại 1: If I know Greek, I can tell you about that.
• Điều kiện loại 2: If I knew Greek, I could tell you about that.

I didn’t eat lunch, I feel hungry now.

• Điều kiện loại 1: If I don’t eat lunch, I will feel hungry.
• Điều kiện loại 2: If I had eaten lunch, I would not feel hungry now.

Stop talking or you won’t understand the lesson.

• Điều kiện loại 1: If you don’t stop talking, you won’t understand the lesson.
• Điều kiện loại 2: If you stopped talking, you would understand the lesson.

I’ll buy a new hat. I’ll give it to you.

• Điều kiện loại 1: If I buy a new hat, I will give it to you.
• Điều kiện loại 2: If I bought a new hat, I would give it to you.

Today isn’t Sunday. The pupils can’t go swimming.

• Điều kiện loại 1: If today is Sunday, the pupils can go swimming.
• Điều kiện loại 2: If today were Sunday, the pupils could go swimming.

He wasn’t here. He didn’t have a lot of fun.

• Điều kiện loại 1: If he is here, he will have a lot of fun.
• Điều kiện loại 2: If he had been here, he would have had a lot of fun.