Here are some English equivalents depending on the context:
* Unless: This is the most common and direct translation.
* Except for: This emphasizes the exclusion of something.
* Only if: This highlights a specific condition.
* But: This is used to introduce a contrasting idea.
Example:
Filipino: Maliban nalang kung maulan, pupunta ako sa parke.
English: Unless it rains, I'll go to the park.
The best English translation will depend on the specific situation and the intended meaning.