Exercise 1. insert the verb to be in the present simple: 1.1 не ... a student. не ... a good student. 1.2 his father ... a doctor. 1.3 my mother ... not a teacher. 1.4 ... your sister a pupil? – yes, she ... . 1.5 they ... at home now. 1.6 this ... my house. 1.7 ... they at school? – no, they ... not at school. 1.8 ... your father a pilot? – yes, he ... . 1.9 nick ... not a student. he ... a pupil. he ... at school now. 1.10 these men ... drivers. 1.11 my friend ... an engineer. he ... at work. 1.12 ... your parents at home? – no, they ... not.

Вот правильные формы глагола to be (am, is, are) для ваших предложений: 1.1 He is a student. He is a good student. (В оригинале «не» — вероятно, опечатка от «he»). 1.2 His father is a doctor. 1.3 My mother is not a teacher. 1.4 Is your sister a pupil? – Yes, she is. 1.5 They are at home now. 1.6 This is my house. 1.7 Are they at school? – No, they are not at school. 1.8 Is your father a pilot? – Yes, he is. 1.9 Nick is not a student. He is a pupil. He is at school now. 1.10 These men are drivers. 1.11 My friend is an engineer. He is at work. 1.12 Are your parents at home? – No, they are not. Краткая справка по правилам:

• Am — используется только с местоимением I (я).
• Is — используется с существительными в единственном числе и местоимениями he (он), she (она), it (оно).
• Are — используется с существительными во множественном числе и местоимениями we (мы), you (ты/вы), they (они).