新课标高中英语第四册unit2课件.ppt

Unit 2 Working the land ;; Check the key words and phrases;If you are a landowner, you want to grow some kinds of crops, what will you do?;First, buy or select the seeds from the store.;Second, we need to plough(犁田） or turn over the soil.;Third , we sow（播种） the seeds in the soil.;Finally, we can harvest our crops. ; to improve the output of the crops ;fertilizer ;chemical farming ;Chemical Or Organic Farming?;Task 1 Skimming （3mins）;Long-term use of chemical fertilizers can cause damage to the land and people’s health.;Task 2 Careful reading;Organic farming;1. Damage the land by killing the helpful bacteria and pests as well as the harmful ones.;Language points;2. Crops put important minerals back into the soil, making it ready for crops that need rich and fertile soil. (para4);区分：动词不定式单独作结果状语，通常表示偶然的，出乎意料的结果，有时为了强调这种意外的结果，可在不定式前加only, 译为“（结果）却……;导练： 1. The news shocked the public, ______ （lead）to great concern about students’ safety at school. 2. He hurried to the cinema only ____________(find) the film had been on. ;3.A healthy soil reduces disease and helps crops grow strong and healthy.(para3) ;