Always encouraging my students to write in more concise sentences, I find it helpful to show them various ways to combine sentences while maintaining clarity. One way to do this is by using participle phrases. Many of the pre-made worksheets I find combine present and past participles into one exercise, and my students, many of whom are ELL, find this confusing and overwhelming. I like to teach them about present participles first, as they are easy and regular. I show them how participles can not only be used in verb phrases, but also as modifiers, either as adjectives or participles phrases.