Question

Complex Object with the Participle (I or II).
Переведите:
1. Она чувствовала, как дрожат её руки.
2. Он почувствовал, как его схватили за ворот.

Answer 1

She felt her hands trembling. (Participle I)
He felt somebody seizing him by the collar. (Participle I) ИЛИ 
He felt his collar seized by. (Participle II)

Answer 2

She felt her hands trembling. 
He felt somebody seizing him by the collar. или  He felt somebody grabbing him by the collar.