The ставится в случае:
1- Конретный предмет (I have bought the black camera.)
2- степень превосходства(I have bought the best camera.)
A/an ставится когда внимание обращается не на существительное а на сам факт. (I have bought a camera.(важен факт того,что ты купил камеру.))
Вроде как то так.
Everyone (well, most of us) loves pets. While most of us limit that love to more conventional animals such as dogs, cats, budgerigars, and fish, there are many who extend it to animals such as snakes and chimpanzees. This gives rise to the debate over keeping exotic wild animals as pets.
In an age of the rising influence of various animal rights movements, the ever-growing trade in exotic pets is an obvious culprit, and regularly finds itself under the microscope. The reason why the debate over exotic pets has rumbled on for so long is that there is no simple answer. There are equally sound arguments on both sides of the debate, and a conclusion is hard to reach. Here's an attempt to do just that.
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1. Students don't go to school on Sundays.
2. In the evening Richard leaves his house at six o'clock.
3. In August usually we go on holidays.
4. On Monday evening we are going to the cinema.
<span><span>May I sit down?</span><span><span>- Могу я сесть?
</span>
</span><span>I mustn’t study.</span><span><span>- Я не должен учиться.
</span></span><span>Can you visit me?</span><span><span>- Ты можешь посетить меня?
</span></span><span>I couldn’t speak to you.</span><span><span>- Я не мог говорить с тобой.
</span></span><span>
I will be able to fly.</span></span> - Я смогу летать.
