Breakdown of بما أنه ليس هناك دم هنا، لا بد أن المجرم نقل الجثة!
الal
the
هناhunâ
here
هناكhunâka
there
هhu
his / him (object) / it (dummy pronoun after لأن)
Questions & Answers about بما أنه ليس هناك دم هنا، لا بد أن المجرم نقل الجثة!
Why do we use لا بد أن here instead of لا بد من?
The phrase لا بد أن is used to express strong probability or deduction (meaning "it must be the case that...") and is followed by a nominal sentence. If we used لا بد من, it would normally express a strict obligation (meaning "it is necessary to...") and would need to be followed by a verbal noun (masdar) or a regular noun.
What case ending does المجرم take in this sentence?
It takes the accusative case (mansub) with a fatha, making it المجرمَ. This is because it directly follows أن (anna), which always requires its subject to be in the accusative case.
How does the Arabic express the past tense "must have moved" without an auxiliary verb like "have"?
The phrase لا بد أن simply frames the sentence as a strong probability ("it must be that"). The past tense comes directly from the main verb نقل (moved). Literally, the Arabic says "It must be that the criminal moved the corpse," which we naturally translate into English as "must have moved."
Why is the pronoun ـه attached to بما أن to make بما أنه?
The particle أن (anna) must always be followed immediately by a noun or an attached pronoun. Because the next part of the sentence (ليس هناك دم هنا) starts with the verb ليس, we cannot attach أن directly to it. Instead, we attach the "dummy pronoun" ـه (-hu), meaning "the fact that" or "the situation," to act as a placeholder subject.