Yes, of course you can. Many questions begin with 'is'. For example:
'Is it raining?'
'Is there anyone there?'
'Is it true that your parents are getting divorced?'
'Is your dog hungry?'
There are infinite possible sentences beginning with the word 'is'.
can you start a sentence using the word phishing?
no!
What sentence would you like?
When it is at the start of a sentence.
No, you cannot start a sentence with "no" unless you need to do so. No reason exists not to start a sentence with that word, as you can see. No one will care if you do start a sentence with it.
start it out with the
Of course you can. There is no word in English that cannot begin a sentence.
Yes, you can.
Yes
sometimes
No, you cannot.
NO