I like this place. = statement I DO like this place. = contrary to expectations, I DO like the place The negatives are as follows: I don't LIKE the place. = statement I DON'T like the place. = contrary to expectations, I DON"T like the place.

A) I like this place. - Мне нравится это место. I do like this place. - Мне действительно нравится это место (глагол do как бы усиливает ваше отношение к тому, что вам нравится именно это место, а не какое-нибудь другое) B) I don't like this place. - Мне не нравится это место. I do not like this place. - Я вообще не хочу видеть это место. (В отрицательном предложении глагол do not to еще усиливает вашу реакцию на предмет, в данном случае вы отвечаете в отрицательном предложении почти утвердительно !)

A) I like this place. / I do like this place. The difference is that in the second phrase, there's an implied question as to whether or not they like the place, in the first phrase there is no implied question, simply a statement. B) I don't like this place. / I do not like this place. Yes, the long form "do not" makes it sound more sure in the second phrase.

Including "do" is emphatic but polite (and as mentioned above, dispels any doubts): "I do like this place" = I like this place very much. Saying "do not" instead of "don't" emphasises the negative: "I do NOT like this place." You lose the negative effect slightly when you contract it to "don't".