certainly
(adverb)
adverb
1. definitely or positively (`sure' is sometimes used informally for `surely')
- she certainly is a hard worker
- they are coming, for certain
Sentences with certainly as an adverb:
- The accident was certainly caused by human error.
- That was certainly sweet of him.
- You may certainly join us for dinner.
- Would you like it with ice? Certainly, and with lemon please.