Grammar: Become

Become

become = to change into a new state, role, or condition

[werden / sich entwickeln zu]

She became tired after the long walk.
[Sie wurde nach dem langen Spaziergang müde.]
He became a teacher in 2015.
[Er wurde 2015 Lehrer.]
The situation became difficult.
[Die Situation wurde schwierig.]

Important: In everyday English, we often use get instead of become.

She got tired. = everyday
She became tired. = more formal

He got angry. = everyday
He became angry. = more formal

Simple rule: when both are possible

Use become for more formal or serious changes.
Use get in everyday spoken English.