Tea will be being taken by us.  = We shall be taking tea.

Take to task = তিরস্কার করা - He was taken to task for his misconduct

Take care of your health. 

= Let your health be taken care of.

System Loss means loss, theft, damage or destruction of the system or any portion or any other occurrence or event that prevents or limits the system from operating in whole or in part, resulting from or arising out of any cause. In electricity, system loss is the difference between the electric energy delivered to the distribution system and the energy delivered to the end-users and other entities connected to the system.

Swim is a good exercise = Swimming is a good exercise.

Ensure

Contemporary

"A stone's throw" is an idiom that means a very short distance. For example, you might say "The apartment is just a stone's throw from the sea"

Stand in the middle of the circle.  = Standing in the middle of a circle.

Stallion- Mare

Staff = Staffs

Sovraign = Sovereign

Someone will walk her dog. (Passive) 

= Her dog will be walked.

Smoke is emitted from the chimney.

Smoke filled the room. (Passive) = The room was filled with smoke.