Breakdown of Ich muss meinen Pass verlängern lassen.
ich
I
der Pass
the passport
mein
my
müssen
to have to, must
lassen
to have something done (causative)
verlängern
to extend, to renew
Questions & Answers about Ich muss meinen Pass verlängern lassen.
Why is lassen used here instead of just saying Ich muss meinen Pass verlängern?
If you say Ich muss meinen Pass verlängern, it literally means you are personally renewing the passport yourself. Adding lassen changes the meaning to "having something done" by someone else (like a government office), which is the natural way to express this in German.
The English translation says "renewed", so why does the German sentence use the infinitive verlängern?
English uses "to have something done" with a past participle, but German uses the construction etwas machen lassen (literally: "to let something do"). Whenever you have a service performed for you in German, you use lassen along with the simple infinitive of the action verb.
How does the word order work with three verbs (muss, verlängern, lassen)?
The conjugated modal verb (muss) takes the standard second position in the sentence. The other two verbs are pushed to the very end. In this construction, the action verb (verlängern) comes immediately before lassen at the end: ... verlängern lassen.
Why is it meinen Pass instead of mein Pass?
Pass is a masculine noun (der Pass). Because the passport is the direct object of the sentence (the thing being renewed), it must take the accusative case, changing mein to meinen.
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