Learn Arabic (Modern Standard): هذا الشرط باطل إلا إذا أرسلت إشعارا. - This condition is void unless you send a notice.

In Arabic, conditional particles like إذا (if) and phrases like إلا إذا (unless/except if) are naturally followed by a past tense verb, even when the condition applies to the present or future. It literally means "except if you sent," but functionally means "unless you send."

What does the word باطل mean in this context?

باطل translates to "void," "invalid," or "null." It is commonly used in legal, formal, or contractual contexts to describe something that holds no binding power. It acts as the predicate (khabar) to the subject هذا الشرط (this condition).

Why is there an extra alif at the end of إشعارا?

The word إشعار (notice) is the direct object of the verb أرسلت. Because it is indefinite, it takes the accusative case (mansub). In Arabic writing, an indefinite accusative noun gets a "tanwin fatha" (two fathas), which usually requires adding a carrier alif at the end.

Why is الشرط (the condition) definite, but باطل (void) is indefinite?

This is a classic nominal sentence structure. هذا الشرط (this condition) acts together as the definite subject, while باطل is the indefinite predicate. The contrast in definiteness between the subject and the predicate is what implies the verb "is" in Arabic.