By: 1. identifying the agent performing an action:
2.indicating the means of achieving something.
• We came by car.
• Fireworks were invented by the Chinese.
• It happened by accident.
• He lost the race by five seconds.
• The room is 10 metres by 6 metres..
• We must finish by Tuesday.
• We were sitting by the window.
• By my calculation he must be 73.
2.indicating the means of achieving something.
• We came by car.
• Fireworks were invented by the Chinese.
• It happened by accident.
• He lost the race by five seconds.
• The room is 10 metres by 6 metres..
• We must finish by Tuesday.
• We were sitting by the window.
• By my calculation he must be 73.