How to make/作り方
This is used by women.
About かな and かしら, they can just be attached to the end of the polite form or short form, but this will sound unnatural if you are young.
example sentences/例文 (audio/音声付き)
I wish he would come quickly.
hayaku kite kurenai kashira.
Isn’t it very risky?
kiken janai kashira.
I wonder what Hokkaido special products are.
Nani ga Hokkaido no meisan nano kashira?
Keep up with your studies!