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.