Vip
Помогите с англ. , пожалуйста!
Найдите в этих предложениях Participle 1, Participle 2 and Gerund(герундий)
2. after having learned the simple relationship existing between the units of mass, length and so on one can use metric system without any difficulty
3. all gases are light when compared(P2) with liquids and solids