Past tense of crew is crewed.
No it does not have to be capitalised.
Depends on where you put it in a sentence
Puritans are not supposed to show frippery.
It should be--- He is at any rate, supposed to speak to them.
Yes, Siamese would be capitalized.
I am supposed to go to my room.
It is actually supposed to. I was supposed to clean my room. Hope this helps!
how am i supposed to know!
If its at the beginning of a sentence then yes. But if its during a sentence then no.
No it does not have to be capitalised.
I can give you several sentences.I supposed that your homework was due today.You were supposed to finish already.We had supposed that the committee was finished already.
'You and your girls' is not a sentence because it has no verb. It can be a sentence by adding one:You and your girls win.
Only at the beginning of the sentence.
Depends on where you put it in a sentence
Politicians are supposed to uphold the duties of their office with wisdom and integrity.
The expression "suppose to" isn't correct. It should be "supposed to"
"She was supposed to be astern while she was sleeping."