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Identify and correct errors involving verbs and verbals

Moisture regularly (have entered/is entering/entered/enters) the atmosphere through the evaporation of water. The warm air rises (to quickly condense/ quickly condensing/ quickly condensed) into rain. Rain falls when the microscopic water droplets in clouds(are colliding/have collided/collide/will collide). If the temperature outside drops to the dew point, relative humidity (has become/ becomes/will become/became) 100 per cent and fog is likely to form. At air temperature above about 4 °C (39 °F), ice crystals in clouds (will melt/have melted/melt/are melting).

By uneven (heating/heat/heats) of land and water surfaces along coastlines local winds are created. In thunderstorms, the motion of the air also causes electric charges (built/building/to build) up inside the cloud, producing lightning. Flashes of lightning heat the surrounding air, (causing/to cause) the air to expand violently.

Weak fronts, where the two air masses are close in temperature, often pass (unnotice/to unnotice/unnoticed /unnoticing). Generally moving from west to east fronts follow (to curve/curved/curving) paths. A front may be warm or cold, (depending/to depend/depends) upon which air mass is pushing the air ahead of it.

In the United States, weather forecasts(are giving/have given/gave/give) barometric pressure in inches. The temperature-humidity index (THI) sometimes (mentioning/mentioned/to mention/is mentioned) in forecasts was once called the discomfort index. Some parts of the weather forecast seem easy enough (understood/to understand/understading/understand).

Problems with verbals

Any of these verbals – gerund, or infinitive – may be incorrectly used when another one of them is required, depending on the meaning. Take, for example, two sentences:

  • I stopped to talk with my friend. The infinitive expresses purpose – I stopped because I wanted to talk with my friend.

  • I stopped talking with my friend. The gerund is an object – I stopped this action because I was pressed for time and had to go.

Unit 1-5. LANGUAGE AND DIVERSITY

Section 1. Guidelines for intensive reading of ESP texts

The author’s tone and attitude

Identifying the author’s tone and attitude is often required for an overall understanding of the passage. Tone questions ask you to determine the author's feelings about the topic by the language that he or she uses in writing the passage. Attitude questions are very similar to tone questions. Again, you must understand the author's opinion. The language that the author uses will tell you what his or her position is.

You should keep in mind that, in ESP texts, most reading passages have a neutral tone, but sometimes an author may take a position for or against some point. However, answer choices that indicate strong emotion – amused, angry, outraged, pleased, and so forth – will seldom be correct.

Text 1-5. LANGUAGE AND SUPERDIVERSITY