Breakdown of Je hoeft de batterij alleen maar op te laden.
je
you (unstressed form of jij)
alleen
alone; only
hoeven
to need (to)
te
to (infinitive marker)
Questions & Answers about Je hoeft de batterij alleen maar op te laden.
Why do we use hoeft here instead of moet, since the English translation says "have to" and there is no negative word?
While you learned earlier that hoeven is used with negatives like niet or geen, it is also used with restrictive words like alleen maar or slechts (both meaning only/just). Because you "only" have to do one limited thing, Dutch treats this as a restricted obligation and requires hoeven instead of moeten.
Why is te placed in the middle of the verb to form op te laden?
Opladen (to charge) is a separable verb, made of the prefix op and the base verb laden. Whenever you need to use te with a separable verb, the te is sandwiched exactly between the prefix and the verb. In modern Dutch spelling, this is written as three separate words: op te laden.
Could I just use alleen instead of alleen maar in this sentence?
Yes, grammatically you could use just alleen, but adding maar is very common and natural here. It softens the statement, emphasizing that charging the battery is a small, easy task, much like saying "you just need to" in English.
What happens if I swap out opladen for a regular, non-separable verb like kopen (to buy)?