While I was considering this question, I came up with a pretty good answer.
While many people like vanilla ice cream, many others prefer chocolate ice cream.
My friend Brad started to jostle me while I was in line.
The sentence is past it has past continuous (was getting) and past simple (started). The past continuous creates the time period in which the other action (started) takes place. 'While he was getting ready for school' is a subordinate clause it needs the other clause (Jose started feeling sick) to make complete sense.
we all started at the same time
I started to work out two weeks ago.
nothing
The sentence is correct if you and the article 'a': "She started her journey a long time ago."
While is a noun in that sentence.
"has started" is the simple predicate.
Yes, it is.
A simple predicate consists of only a verb or verb phrase. In this sentence the verb phrase is -- has started
The sentence should be: "Hardly had I started out on the journey when the car broke down." This is an example of inversion in English grammar, where the subject follows the auxiliary verb "had" in order to emphasize the timing of events.
theyhad arrived just before the meeting started.