Люди exercise1: make sentences with the present perfect and for or since example i/not/ play/ basketball/ last summer i have not played basketball since last summer 1.i know /this/ school/ more than 15 years 2.i/not see/my schoolmates/1987. 3.dmitry and omar good friends/they were at school together. 4.a lot of people/live/ in this town/ a long time 5.the weather/bad last week exercise 2: complete the questions! 1.have /you/write/ever/a letter/to/ palfriend? 2.where/you/have/meet/him? 3.she/be/have/ to/this place? you/have/invite/him/ever/to/your town? 4.he/have/be/kazakhstan/ever/to/ before? exercise 3 : the present perfect with just, already, yet 1.i(finish already) it. i have already finished it 2.my friend (eat already) lunch he ate it an hour ago 3.when is victor going to see the film? he(see already) it. 4. this is a good book. would you like to read it? thanks, but i (read already) it. i read it 3 month ago. 5.are you going to finish this exercise before you go home? i (do, already) it. i did it 15 minutes ago. 6.are you going to meet your penfriend? i (meet already) at the airport. i met him at the airport last saturday.

Условные предложения первого типа (First Conditional) – простейший тип условных предложений в английском языке. Такое предложение также называют «реальным» условным – оно показывает действие, которое случится в будущем, если выполнить условие.

Пример

If your daughter studies hard, she will pass the exam. – Если ваша дочь будет усердно учиться, она сдаст экзамен (успешно).

Как образуется First Conditional

First Conditional (первое условное наклонение) используется тогда, когда мы говорим о своих планах на настоящее или ближайшее будущее и выполнение этих планов реально.

При построении условных предложений в русском языке мы обе его части ставим в будущем времени. В английском языке после if (условная часть) мы употребляем Present Simple (настоящее время), а во второй части предложения (результат) – will + глагол в инфинитиве.

If + Present Simple will + verb

Пример:

If I have time, I will watch TV. – Если у меня будет время, я посмотрю телевизор.

Части предложения можно менять местами, например:

I will watch TV, If I have time.

ЭТО ПРАВИЛО

1. Mixed economy is an economic system in which some industries (are owned) by the state and others (are owned) by private persons and firms.
2. When supply is increased, a larger amount (is offered) at a given price.
3. The supply of agricultural products cannot be (increased) within a very short period of time.
4. The aim of the Organization of Petroleum (Exporting) Countries (OPEC) (founded) in 1961 is to maintain a standard price for oil and, if necessary, to limit output. In 1973 the OPEC suddenly (began) to use its influence (raising) the world price of oil so that by the end of 1974 the price (had risen) three times in most (importing) countries. It (has increased) many times since then.
5. Marginal revenue is the additional revenue (earned) by a producer from selling one more unit of his product.
6. Money supply is the total amount of money (held) by all persons and organizations in a country at a particular time.
7. The revenue (obtained) from selling output depends on the demand.
8. Landless farmers, that is, farmers (owning) no land, have to cultivate land (owned) by others.
9. Economists use the word «capital» for goods not entirely (used) up in the production process, during a particular period. Electricity is not «capital» as it (is used) entirely in the production process.
10. With less risk of a fall of price between the time decisions (are made) and commodities (are sold), producers will use additional inputs.
11. Supply (depends) on output prices and input prices. An increase in the price of an input (results) in a reduced use of that input. A reduction in the price of an output (has) the same effect as an increase in the price of input, that is, a reduced use of input. The input use (won't change), provided output and input prices (rise) or (fall) by an equal percentage. Thus, the effect on output of a decrease in product prices (can be neutralized) by an equal percentage decrease in input prices. Sometimes the prices of inputs and outputs (change) together. For example, a fall of livestock product prices (reduces) the demand for feed grains. This (leads) to a fall in the price of feeds, that is, the price of inputs.