Ex. 1. Compare Russian and English Tense forms

UNIT 5

Ex. 18. Translate from Russian into English.

Ex. 17. Translate from English into Russian.

Ex. 16. Give the proper English equivalents for the Russian expressions.

1. Нам пришлось perform the operation of addition to find the answer. 2. Ему предстоит specify the conditions of the experiment. 3. Им разрешают use a dictionary if necessary. 4. Я в состоянии solve this difficult problem myself. 5. Вам следует remember that multiplication is associative. 6. Ей не надо use this theorem. 7. Они могут apply their theories in practice. 8. Вы обязаны remember several rules about division. 9. Можно мне start the calculations now? 10. Вам следует to accept everything your parents say as an axiom.

1. Everyone studying mathematics must have a good understanding of the meaning of each symbol. 2. These expressions may contain numbers and letters. 3. Multiplication can be distributed over addition, e.g. 14x12 = (14x10)+(14x2) 4. A prime number is a number that can be divided evenly by only 1 and itself. 5. No multiplication sign is to be used between two letters or a letter and a number written side by side. 6. The plus sign should be understood when there is no sign before the number. 7. Will you be able to name other factors of 18 except nine and two? 8. In some cases, when we have to name a whole number in a factored form, more than two factors can be used. 9. A positive number can be indicated by placing a plus sign (+) before the number. 10. When the minus sign is placed between any two numbers, it indicates that the difference of the two numbers is to be found. 11. Division may be indicated also by writing the dividend above the divisor with a line between them.

1. Числа, которые нужно сложить, называются слагаемыми, а результат сложения называется суммой. 2. Эти числа предстоит перемножить. 3. Мы должны записывать результат справа от знака равно. 4. Число можно поделить на два без остатка (точно), если это четное число. 5. Деление обратно умножению. 6. Произведение любого числа, умноженного на ноль, равно нулю. 7. Никто не может сказать, когда люди начали считать. 8. Они обозначили (указали) операцию сложения знаком плюс. 9. Ни один студент не мог решить задачу, заданную профессором. 10. Им придется использовать двоичную систему счисления. 11. Данный элемент может быть обозначен тем же символом.

Grammar: Present, Past, Future Perfect (Active Voice)

The Present Perfect Tense	The Past Perfect Tense	The Future Perfect Tense
have/ haven’t + V3 has/ hasn’t + V3	had/ hadn’t + V3	shall/ will have + V3 shan’t/ won’t have + V3
a) Resultative Perfect just, yet, already, ever, never, lately, recently, today, this week, this month, etc. They have not done it yet. Они еще это не сделали. b) Durative Perfect (to be, to have, to know) for, since, how long How long have you known him? Как давно ты его знаешь?	by 6 o’clock yesterday, by that time, by the end of last year, before he came They had done it by the time we came. Они сделали это к нашему приходу. They hadn’t done it by the time he came. Had they done it by the time you came?	by 6 o’clock tomorrow, by this time tomorrow, by the end of next year, before he comes They will have done it by 6 o’clock tomorrow. Они сделают это завтра к шести часам. They won’t have done it by 6 o’clock tomorrow. Will they have done it by 6 o’clock tomorrow?

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