Question

ПОМОГИТЕ ПОЖАЛУЙСТА!!!!!

Перекладіть речення, вкажіть стан та час присудка (active or passive)
1) The compression stroke takes place, when both valves are closed.
2) The piston must be connected to a mechanism, which controls it's sliding.

Answer 1

1) The compression stroke takes place(active),
      when both valves are closed (passive).
2) The piston must be connected (passive) to a mechanism,
     which controls (active) it's sliding.