Grammar

und adds, aber contrasts, oder offers an alternative, denn supplies a reason, sondern replaces a negated alternative. These coordinating connectors do not, by themselves, send the finite verb to the end: Ich bleibe zu Hause, denn ich bin müde. When the subject is the same, it can often be shared: Ich koche und höre Musik.

deshalb/dann are not the same kind of connector. When they start a main clause, the finite verb follows: Ich bin müde. Deshalb bleibe ich zu Hause. Dann schlafe ich. A later chapter introduces subordinate weil; do not mix the two word-order patterns.

Example

Ich möchte kommen, aber ich muss arbeiten.

English

I would like to come, but I have to work.

Hinglish

Main aana chahta hoon, lekin mujhe kaam karna hai.