1. Keep silent or you’ll wake the baby up

. →If YOU DON'T KEEP SILENT , YOU WILL WAKE THE BABY UP

2. Stop talking or you won’t understand the lesson.

→ If  YOU DON'T STOP TALKING , YOU WON'T UNDERSTAND THE LESSON

3. I don’t know her number, so I don’t ring her up.

→ If I KNEW THE NUMBER, I WOULD RING HER UP

4. I don’t know the answer, so I can’t tell you.

→ If  I KNEW THE ANSWER, I COULD TELL YOU

5. We got lost because we didn’t have a map.

→ If  WE HAD HAD A MAP, WE WOULDN'T HAVE GOT LOST

6. Susan felt sick because she ate four cream cakes.

→ IF SUSAN HADN'T EATTEN FOUR FCREAM , SHE WOULDN'T HAVE FELT SICK

$1$. If you don't keep silent, you will wake the baby up.

$2$. If you don't stop talking, you won't understand the lesson.

$3$. If I knew her number, I would ring her up.

$4$. If I knew the answer, I would tell you.

$5$. If we had had a map, we wouldn't have got lost.

$6$. If Susan hadn't felt sick, she would have eaten four cream cakes.