how do i get past the place where there i place the dead body one lever
and l stand on one lever but there isnt enough time to get to the gate
before it closes

.the tri-gate puzzle solution:
"there is a step-button in the center of the room, a partially-opened gate with a
step-button on the left side, and a closed gate on the right. Look for the lever on the
upper right side of the room and activate it to lower the gate on the right side. There is
a dead body lying on the ground but don't grab it yet!
Break open the wall next to the body to reveal a small waterway
(eliminate the soldier). Go to the left gate (jump over the spikes) and break open the
wall behind the gate to reveal another waterway. Now go
Back and grab the body on the right side and toss it into nearby the
Waterway. Head back to the waterway on the opposite side and wait for
The body to appear. Quickly grab the body and place it on the step
Button to partially open the main gate. " walktrough by whysotan

There is a huge button in the centre of the room in the left side there is a half opened
door kind of thing in the right there is a fully opened door. In the left room there is a
button. Go to the right room you'll find a body break a wall near it and ther'll be a
stream drop the body there it will flow. Now come to the right room break that wall and
there will be a stream the body which you left in the right stream will flow till here
then pick up the body and place it on the button. Then go the centre button step on it and
the gate will open then you have to run towards the gate. Don't worry if you missed to
collect the body which flowed to the left stream it will again come to the right stream.
Your's gamingly
Jet