In modern English I wish I were an optimist is correct.
Remember that was is the past tense. That sentence is talking about something that the subject is not, so it means: "I am not an optimist, but I wish I were."
it is i wish i were younger because it sounds more firm and proper but if your in a rush either way is fine
No
There is a mistake in your bill.
You and your dad went to the store
"If" makes it conditional, so "... what would you do?" would be proper.
I would have loved to meet your friend.
The correct grammar is "Between you and me."
It is correct.
no_____If the sentence is You do do that (meaning You are in the habit of doing that) the grammar is perfectly correct and the sentence 'does have correct grammar'.
The correct sentence is: "Have you ever traveled before?"
No
shone
was arrested
That sentence is grammatically correct.
The expression "suppose to" isn't correct. It should be "supposed to"
There is a mistake in your bill.
I believe it is "have"
I enclosed letters for Nadine and you.