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You stand on the airboard and ride it like a skateboard. The board moves on a cushion of air, like a small hovercraft. It has a fibreglass body, an engine, a large fan, a flexible rubber skirt, a friction wheel, a handlebar and two levers.
The engine and the fan are mounted on the body. The skirt and the friction wheel are suspended from the body. The handlebar is mounted on the body, at the front. The levers are attached to the handlebar.
The engine drives the fan. The function of the fan is to suck air in and to force it downwards. This pushes the vehicle upwards and propels it forwards. On the body there is a fibreglass platform. This supports the rider. The skirt contains the air and the cushion of air supports the airboard. The rider uses the handlebar to steer the board. One lever controls the speed of the engine and the fan. The other lever controls the friction wheel. The friction wheel touches the ground for one or two seconds and accelerates the airboard into the air. If you want to stop, simply release the levers.

1) If Frank`s gone out, we would ask John to help us.
2) If Sally had spare time, she could pay you more attention.
3) If she had notheard the news, she wouldn`t have gone there.
4) If the factory did not cut back proprobuction, many people would have their work.
5) If the train were less crowded, we would be more comfortable.
6) What would they have done if we had not helped them?
7) If we had been there, it wouldn`t have happened.
8) He might have heard the news, if he had not turned off the radio.
9) If the boy were attentive, he won`t make any mistakes in his dictation.
10) If you had asked her for tickets, she could have noticed the fire. 
11) If he had not come home, he wouldn`t have noticed the fire.
12)
13) We wouldn`t have gone to (thuse) party if we had known the truth.
15) If you visited the dentist, you wouldn`t have a problem with your tooth.
16) If I am not out of university, I will be working as a foreign correspondent

1)If Frenk`s  gone out, we would ask John to helpus.
2) IF Sally  had spare time, she could pay you more attention.
3) If she wouldn't heard the news, she wouldn`t have gone there.
4) If the factory wouldn't  cut back (proprobuction-рассмотрите это слово), many people would have their work.
5) If the train  were less crowded, we would be more comfortable.
6) What would they have done if we wouldn't helped them.
7) If we were  there, it wouldn`t happened.
8) He might have heard the news, if he wouldn't turned on the radio.
9) If the boy were attentive, he won`t make any mistakes in his dictation.
10) If you would ask her for tickets, she could have noticed the fire. 
11) If he wouldn't  come home, he wouldn`t have noticed the fire.
12) If I wouldn't  come home,in a shower I would answer the call.
13) We wouldn`t have gone to the  party if we wouldn't know the truth.
15) If you would visit  the dentist,you wouldn`t have a problem with your tooth.
16) If I were not out of university, I will be working as a foreign  correspondent.