Learn Swedish: Blev lasten stoppad i tullen? - Was the cargo stopped in customs?

Yes, absolutely! Both blev stoppad and stoppades form the passive voice. The bli-passive (using a form of bli + the past participle) often feels a bit more colloquial or focuses on the sudden event or result of the action (getting stopped). The s-passive can sound slightly more formal, but in this context, they are virtually interchangeable.

Why is the participle stoppad instead of stoppat?

In the bli-passive, the past participle functions like an adjective and must agree with the subject's gender and number. Because lasten (the cargo) is an en-word, the participle takes the en-form: stoppad. If the subject were an ett-word like paketet (the package), it would be Blev paketet stoppat?

Does tullen mean a road toll or border customs?

It can technically refer to both, but in the context of goods, borders, and inspections, tullen almost always refers to customs (the government agency or checkpoint). If you want to talk about a toll fee paid on a highway, you would typically use a compound word like en vägtull (road toll) or en trängseltull (congestion charge).

If I made this an indirect question, how would the word order change?