Tham khảo tài liệu 'grammar way three part 32', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Writing Activity Suggested answer . many different species of fish live on coral reefs. However the fish are dying because fishermen are destroying coral reefs. Fortunately some fishermen have stopped fishing near coral reefs. It is also true that many people use coal and oil as fuel for heating in their homes. However coal and oil supplies are decreasing. Luckily many people have changed to other sources of fuel for heating. Finally ocean life produces 90 of our oxygen. However we are polluting the oceans with rubbish. The good thing is that we have begun to recycle rubbish instead of throwing it all away. UNIT 2 Past Forms -e d completed hired promised double consonant rubbed travelled ed referred consonant I tried cried tidied vowel y ed I prayed played destroyed 2 heard 8 was standing 3 opened 9 saw 4 was opening 10 was moving 5 were trying 11 was holding 6 climbed 12 knew crept 13 were looking id after 1 d presented started needed attracted protested pretended 1 after k s tf f f p attached jumped crashed looked kissed d after all other sounds I preferred arranged watered cleaned I I 2 SA What was Mrs Scott doing SB She was watching TV. 3 SA What was Grandma doing SB She was knitting. 4 SA What was Lisa doing SB She was writing a letter. 5 SA What were Tom and Paul doing SB They were playing with their toys. 6 SA What was the cat doing SB It was sitting by the fire. Infinitive Past Participle Past begin began begun blow blew blown creep crept crept dig dug dug eat ate eaten fall fell fallen feel felt felt hang hung hung pay paid paid ride rode ridden shake shook shaken speed sped sped throw threw thrown Ss make own sentences A 2 was 3 appeared 4 produced Use - 1 2 3 4 - past simple used to talk about the life of a person who is no longer alive B 1 happened 2 was sitting 3 were watching 4 went out 5 became Use 1 - past simple for an action which happened at a definite past time 2 - past continuous to describe the setting etc. in the introduction to a story 3 - .
