The main idea of the sentence is 'I stopped the car', so this is the independent clause. 'When the whistle blew' gives additional information, but isn't meaningful alone. It is the dependent clause.
Whistle when in doubt
on your paper the boy put down whistle as it's sentence.
I whistle when I'm scared.Sometimes, I whistle but only make a blowing sound.I whistle to keep a good mood.
Whistle
Sure! In the sentence "She can whistle," "whistle" is the main verb and "can" is the helping (modal) verb.
The referee blew his whistle to signal that there was a penalty.
The nouns are whistle, start, and practice.
The sentence is active. To make it passive, you would write "Lunchtime was announced by the noon whistle."
He blew a whistle to signal the start of the race.
"when the whistle blew"
He liked to whistle as he walked.The whistle signalled the end of the match.
Play is stopped and a goal is not awarded. The restart will depend on the reason the referee blew the whistle.