I'm a bit uncertain (as to?) how we use as to in sentences. For example, I was about to send this message to a friend of mine but eventually I changed it because I wasn't sure if the way I was going to use as to was correct or not.
Do you think your Mark could advise me as to applying for a PhD?
Thanks
Top answer
" It's a bit formal.
— Deadrat
" It's a bit formal.
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"As to" is not wrong, but you're talking to a friend over an informal channel (email? text? facebook?) so "as to" sounds stiff. Why wouldn't you write conversationally?
"Do you think Mark could advise me about applying for a PhD?"