Before she could open it, she heard a noise.Main clause:... she heard a noise.
Adverbial clause of time:... she could open it
Subordinating conjunction: Before...
The comma separates the clauses because the sentence
begins with a conjunction.She ran to the window, which was open, and peered out.Main clause: She ran to the window...
Adjectival clause modifying
‘window’:... was open...
Relative pronoun linking
clauses:... which...
Main clause (subject
understood):... (she) peered out.
Co-ordinating conjunction:... and...Using ‘who’
The man, who was looking up at her, looked very angry.
Main clause: The man...... looked very angry.
Adjectival clause:... was looking up at her...
Relative pronoun:... who...It was the man who had followed her and who had
frightened her dog so he had run away.Main clause: It was the man...
Adjectival clause:... had followed her...
Adjectival clause:... had frightened her
dog...
Adverbial clause of reason:... he had run away.
Relative pronoun: who
Subordinating conjunction: so58 / IMPROVE YOUR PUNCTUATION & GRAMMAR