Verb conjugation of "say" in English

Actually, he is entering it into our website and marking 'I took the idea from another source' then the website knows that it should not display any of this content. However, the user is allowed to exercise what he entered.
In plural there is no difference between the formal and the colloquial address form. Do you mean that you are using 3rd person singular form for the plural imperative? If so, I will change all entries so far.
That is a beautiful name you have got. It would be very helpful if you answered my mail before next week because I will have my final test on Wednesday. I will understand if you won't be able too.