The sentences that correctly express the conditional mood are:
- Correct: If we had left earlier, we would have arrived on time.
- Correct: If the rain had stopped, you could have gone to the park.
The other sentences are incorrect:
- Incorrect: If Evan had called, we would make plans for later. (It should be "would have made" to account for the past conditional situation.)
- Incorrect: If the flowers are blooming, they would have smelled sweet. (It should be "they will smell sweet" to express a future possibility or "they would smell sweet" for a hypothetical statement.)