nothing
A simple predicate consists of only a verb or verb phrase. In this sentence the verb phrase is -- has started
To change the narration of an optative sentence started with 'if', you can convert it into a statement or a command depending on the context. For example, "If only I could go!" can be changed to "I wish I could go" or "I want to go."
No. Cauliflower cheese is not a proper noun and only the word cauliflower would have a capital on the first letter if it started a sentence.
we all started at the same time
I started to work out two weeks ago.
The sentence is correct if you and the article 'a': "She started her journey a long time ago."
"has started" is the simple predicate.
Yes, it is.
"Has started" is the correct verb to use in this context. The sentence should be written as "The weekend has started."
Only as they are used in this sentence.
You cannot, because the main verb "is" does not have a passive form. Only the predicate may be expressed in the passive: ...time for the class to be started.
She jumped the gun. She started at 3, when the other started at GO!