人教版八年级英语下册Unit8 第三课时课件（24张）.ppt

;;;;;;;Unit 8 Have you read Treasure Island yet?;Revision;;现在完成时态的构成： 现在完成时是由“助动词have / has+ 动词的过去分词”构成的，规则动词的过去分词构成与过去式相同，不规则动词的过去分词则需逐个记忆。 ; 动词的过去式的变化和过去分词的变化并不完全相同。我们对它们作了一个大致的分类。 (注：例子中单词的变化顺序为：动词原形 → 动词的过去式? → 动词的过去分词);一、过去式和过去分词的变化相同 规则变化： 1. 一般在动词词尾直接加ed。如： pick → picked → picked; wish → wished → wished; stay → stayed → stayed 2. 以不发音的e结尾的动词后面加d。如：like → liked → liked; hope → hoped → hoped; phone → phoned → phoned;3. 以“辅音字母 + y”结尾的动词，变y为i，再加-ed。如： study → studied → studied; hurry → hurried → hurried; reply → replied → replied 4. 词尾只有一个辅音字母的重读闭音节动词，要双写辅音字母，再加-ed。如：stop → stopped → stopped; clap → clapped → clapped;不规则变化： 5. 以不变应万变。如： let → let → let; put → put → put; read → read → read 6. 若中间有双写e，则去掉一个e，单词末尾再加t。如： feel → felt → felt; keep → kept → kept; sleep → slept → slept;7. 结尾的字母d变t。如： lend → lent → lent; build → built → built; send → sent → sent 8. 变为以-ought或-aught结尾。如： buy → bought → bought; bring → brought → brought; catch → caught → caught; teach → taught → taught; ;3. A: Do you know when Tom is leaving? B: _________________. (already/ leave) A: When ___________? (leave) B: This morning. 4. A: Is your sister going to the movies with us tonight? B: No. _________________________. (already/ see the film);5. A: What do your parents think about our plan? B: I __________________. (not/ tell them/ yet);4b Fill in the blanks with the correct forms of the words in the brackets. Sally _____ (love) reading. In the morning she reads the newspaper and in the evening she reads books. She ___ already ____ (read) more than 100 different books. Her favorite kind of books is science fiction. She is interested in science and technology and loves to imagine what the world ______ (be) like in 50 years. ; She _______ (finish) reading a book about robots last week and _________ (write) a book report about it next week for her French class. Every time she is in