In spite of the fact that the adverb in comparative degree has distinctive signs, it is quite difficult to distinguish it in the text. At first sight it can be mixed with adjectives in the same degree. So for identification of an adverb it is worth looking for all following signs in total.
It is required to you
1. Adverbs in comparative degree are formed from qualitative adjectives. These are such adjectives which, unlike relative, designate sign which can be shown to a greater or lesser extent. For example, such signs as color, sound, smell, temperature, etc.
2. The sign which calls an adverb in comparative degree, is defined as more expressed in comparison with other its possible manifestation.
3. To find a required part of speech, put a word which you consider an adverb in comparative degree, in its initial form, having removed comparative degree. Or form a compound form with the word "more". For example: The movie is more interesting than the book – the Movie more interesting, than the book (adjective); This movie is dubbed more interestingly, than previous – This movie is dubbed more interestingly (adverb).