hello there~
here has 2 sentences, i still don't really understand "which" and "which is" are how to use in sentences, why?
1) I don't know which parts went wrong.
2) Taipei city is in a basin which is a disadvantage for scattering heat.
"Which" like "that" can be used in a number of grammatically different ways. Which book are you reading? (Used as an adjective and indicates a question about what the particular book you are talking about is (out of all books).
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"Which" like "that" can be used in a number of grammatically different ways.
Which book are you reading? (Used as an adjective and indicates a question about what the particular book you are talking about is (out of all books).
I am reading a biology book, which is required for my class. (Used as pronoun and introduces a relative clause).
So your first sentence is like my