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Формы глагола TO BE

  With Subject Form
Base   be
Present Tense I am
  He, she, it is
  We, you, they are
Past Tense I, he, she, it was
  We, you, they were
Future Tense I, we shall be
  He, she, it, you, they will be
ing-form   being
Past Participle   been
Full positive form Contraction Full negative form Contraction
I am I’m I am not I’m not
He (she, it) is He’s He (she, it) is not He isn’t
We (you, they) are We’re We (you, they) are not We aren’t
I (he, she, it) was I was I (he, she, it) was not I wasn’t
We (you, they) were We were We (you, they) were not We weren’t
I ( we) shall be I’ll be I ( we) shall not be I shan’t be
He (she, it, you, they) will be He’ll be He (she, it, you, they) will not be He won’t be

Отрицательная форма повелительного наклонения образуется при помощи Do not (Don’t): Don’t be angry. Не сердитесь.

Don’t be late. Не опаздывайте.

Задание 1. В каком из предложений глагол to be употреблен в своем основном значении “быть, находиться”?

1. A conductor is a material having free charges which move under the influence of an electric field. 2. Either changes of current can be shown graphically. 3. The state of the problem was shown in this article. 4. Electrons which are relatively free of atoms are called free electrons. 5. The power of an output signal of an amplifier is much higher than the power of its input signal. 6. An electromagnetic wave is invisible.

Задание 2. Поставьте глагол to be в Present Simple (am, is, are), Past Simple (was, were), Future Simple (shall be, will be). Прочитайте и переведите предложения, поставив глагол to be нужной форме.

1. The free charges in an electrolyte ____ positive and negative electron.

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