Archimedes. Why in the first place was the ancient Greek scientist? First of all, because he is one of the greatest mathematicians of all times, close he came to the calculation of the number of "PI". Today all students and students of the daily study and enjoy the discoveries of the Greek. Also Archimedes was famous for the invention of many useful machines. Among these are the siege guns, and mirrors, поджигающие sails on the Roman ships by focusing sunlight. Archimedes made the first theorist of mechanics. For example, he presented the complete theory of the lever, applying it in practice. Also, scientists have developed a Archimedes screw (screw), with the help of which вычерпывается water and the present day. The primacy of the inventor of merit - all of it was opened more than two thousand years ago, when there were no computers, no technology available today, the inventors. Archimedes, perhaps, he studied in the libraries of Alexandria, but most of his knowledge was acquired independently.
1 He must knock on the door before entering. (после модального глагола must инфинитив используется без частицы to)
2 She ought to sign this document before leaving us. (модальные глаголы не изменяются по лицам)
3 I'm in time, aren't I? (Если в первой части предложения используется конструкция “I am”, то “хвостик” будет выглядеть так: “aren’t I?”)
4 She asks me to remember her to Mr. Sandford. (remember to - передавать привет)
5 They wonder what it is. (прямой порядок слов, потому что это не вопрос, а придаточное предложение)
I've got two brothers.
I've got a job.
I've got a pet.
I've got a ticket.
I haven't got a house.
I haven't got dogs.
I haven't got this toy.
I haven't got magazines at all.
I haven't got a sister.