Not to make punctuation mistakes at the use of a participial phrase, it is necessary to see accurately its borders in the offer and the place in relation to the defined word. This ability will be required to school students when finding of the isolated and not isolated attribute in the text during passing a SFE and the USE on Russian.
First of all, you have to learn to find a participle in the offer and in the text. Remember that the participle designates sign (as well as an adjective), but on action. This part of speech is formed from verbs by means of suffixes ""ushch"", ""yushch"", ""vsh"", by ""highway"" (if this active participle) and ""I eat"", ""ohm"" "", t"", ""enn"", ""N"" (if it passive). So, for example, from the verb ""glue"" it is possible to form active participles ""gluing"", ""gluing"", ""glued"". The participle bears in itself signs of an adjective (changes on sorts, numbers, cases, is definition in a full form and a predicate - in short). However it can be used in the present or in past tense, as well as verbs. Further you have to acquire that if at a participle there is a dependent word (that is you will be able to raise from it a question to some word), then this syntactic design and will be a participial phrase. For example, ""The fire inflaming promptly covered all glade in the offer"" the word ""inflaming"" is a participle as it designates sign (answers a question ""what?""), but on action (that which inflames), it is formed from a verb by means of a suffix ""yushch"". From a participle you will be able to raise a question ""as?"" to an adverb is ""prompt"". Therefore, the phrase "inflaming promptly"" is commas. And here ""The fire inflaming promptly covered all glade in the offer the"" participial phrase ""inflaming promptly"" is before the defined word ""fire"" and is not allocated with commas. The participial phrase is one (indivisible) definition. If the participial phrase is allocated with commas on the letter and in oral speech - a pause and special intonation, then this definition is called isolated. The participial phrase is necessary to give to the text more expressiveness and in more detail to describe the subject of the image.