Choose the relationship first
Compare Ich bleibe hier, weil es warm ist. (I am staying here because it is warm) with Ich glaube, dass es warm ist. (I believe that it is warm). The first explains a decision; the second tells you what someone believes. The connectors are not interchangeable.
Ich hoffe, dass der Bus bald kommt.
I hope that the bus comes soon.
Keep the two clauses separate
In Ich bleibe hier, weil es warm ist., the first clause retains its familiar order. Only the reason clause puts ist after warm. A comma marks the boundary. Do not move the main-clause verb to the end of the whole sentence.
Wir warten, weil unser Bus später kommt.
We are waiting because our bus is coming later.
A verb group can contain more than one word
A modal follows its action infinitive: weil ich lesen möchte. A perfect auxiliary follows its participle: dass sie gewartet hat. A separable present form joins together: weil er ankommt. These are short, useful patterns; larger verb groups have additional rules.
Ich glaube, dass der Bus gleich ankommt.
I believe that the bus is arriving soon.
Does dass mean the information is true?
No. Ich hoffe, dass ... expresses a hope; Ich glaube, dass ... expresses a belief. The connector introduces the content without guaranteeing it. The reporting verb matters.
Ich hoffe, dass wir pünktlich sind.
I hope that we are on time.
What about spoken weil?
You may hear spontaneous speech with main-clause order after weil. This guide teaches the standard written verb-final pattern. It is a reliable starting point, not a claim that every other spoken construction is meaningless.
Ich fahre früher los, weil ich pünktlich sein möchte.
I am leaving earlier because I would like to be on time.
Practise this pattern
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References
Original teaching prose and examples, informed by these grammar references. A2 placement is an editorial curriculum choice, not a CEFR certification.