Помогите пожалуйста с заданием. Переведите предложения, обращая внимание на причастие.1.At

Помогите пожалуйста с заданием. Переведите предложения, обращая внимание на причастие.
1.At the conference they discussed new methods used in building. 2. Being very busy I couldnt attend the lecture of the famous mathematician. 3.Having successfully passed their examination the students went to the exhibition. 4. The article translated by the student is very interesting. 5.Having analysed several problems of this type he knew how to solve them. 6. Having been sent to the wrong address the letter didnt reach him. 7. The leaves lying on the ground reminded us of autumn. 8. These machines will be sent to the plant being constructed in this region.