Just a few more comments:
Quoc, if you intended (1) to be a
complete sentence, then it should be something like this:
How can you change this clause into a subordinate clause?
In addition, "change
in" and "transform
in" do
not mean the same thing as "change into" and "transform into".
- Using "into indicates that you want to change the whole thing completely.
- Using "in" means you want to change only a part of or piece of
something (inside of it) but the change will not necessarily alter the
nature of the whole thing.