Questions & Answers about Mein Bruder tut so, als ob er keine Zeit hätte.
The verb tun literally means to do, but in the pattern so tun, als ob … it forms an idiomatic expression:
- so tun, als ob … ≈ to act as if / to pretend that …
So:
- Mein Bruder tut so, als ob …
≈ My brother acts as if / My brother pretends that …
You cannot simply drop tut so and start with als ob; als ob just introduces the comparison clause, while tut so provides the main verb and the idea of pretending or acting in that way.
Grammatically, tun is the conjugated verb in the main clause (present tense: tut), and so is an adverb modifying it: to do like this / to behave like this.