Questions & Answers about Jag blir irriterad när bussen är sen.
Blir irriterad means become irritated / get irritated, so it focuses on the change of state.
- Jag blir irriterad när bussen är sen = I get irritated when the bus is late.
- Jag är irriterad = I am irritated.
In this sentence, Swedish prefers blir because it describes what happens in that situation: the late bus causes the feeling.
Irriterad is an adjective meaning irritated or annoyed.
The -ad ending is very common in Swedish adjectives that come from verbs or participle-like forms, especially for feelings or states:
- intresserad = interested
- stressad = stressed
- överraskad = surprised
- irriterad = irritated
Here it agrees with jag, but in this form there is no extra ending needed.