Music.work.watch.shower.<span>hiking </span>
The term “internal combustion piston engine” referS to engines in which air and gasoline are buRNT inside the metal cylinders and which drive rotating crankshaft by means of piston and connecting rods. Since a great deal of heat IS produced when the gasoline mixture burns or explodes, some means must be provided to CARRY away the excessive heat. According to the cooling system employed the piston engines may BE CLASSIFIED as air-cooled engines and liquid-cooled ones.
1) Alice has a sister .
<span>2) Her sister's name is Ann.</span>
He can come in to class.
He can't come in to class.
Does he can come in to class?
You should to go library, on the weekend they don't work.
You shouldn't go to library on the weekend they don't work.
Do you should to go library on the weekend , do they work ?
We can water the flowers.
We can't water the flowers.
Do we can water the flowers?
1. Somebody has cleaned the room.
The room has been cleaned.
2. They have postponed the concert.
The concert have been postponed.
3. Somebody had repaired the computer by the moment they came.
The computer had been repaired by the moment they came.
4. I didn't realise that somebody had recorded our conversation.
I didn't realise that our conversation had been recorded.
5. When we got to the stadium, we found that they had cancelled the game. When we got to the stadium, we found that the game had been cancelled.