That's nice of you to say so! It's nice of you to say so! Sentence 2 is correct because 'it' here is a subject and means 'to say so'. So 2 means 'For you to say so is nice'. In sentence 1, 'That' is …
The trick is that there is a verb missing (and replaced by the word "that"). Here are some examples -- first, pick the verb "to help". Then you have: "To help is very kind of you." Or: "To …
Putting "very" in front of it doesn't change that; it still needs the "a". It doesn't even depend on the word "nice". "Evening" is a countable noun, so it does need the article. @MrLister The one …
"Bye" cannot be written as "By". They are very different words, and it is 100% incorrect to spell "Bye" as "By". It might be written that way in very informal messages where there's not …
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