unit 10 i’ve had this bike for 3 years.
section b (grammar focus 4a-4c)step 1 warm up
read the following sentences we h**e you read little women yet?
yes, i h**e./ no, i h**en't.
has tina read treasure island yet?
yes, she has. shethinks it’s fantastic.
h**e you decided which book to write about yet?yes, i h**e. i’ve already finished reading it.
it was really good.
step 2现在完成时。用法。
表示过去发生或已经完成的某一动作对现在造成的影响或结果。
you had your lunch yet?
yes, i h**e. i’ve just had it. (现在我不饿了。)2.表示动作或状态从过去某一时刻开始，一直延续到现在，而且可能还要继续下去。
i h**en’t seen her these days.
i’ve known bob for three years.
i’ve been at this school for over two years.
时间状语。already, yet, just, ever, never, before构成。
现在完成时是由“助动词h**e/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→
stayed2.以不发音的e结尾的动词后面加d。如：like→
liked→
liked; hope→
hoped→
hoped; phone→
phoned→
phoned3.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→
replied4.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→read6.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→
slept7.结尾的字母d变t。如：lend→
lent→lent; build→
built→
built; send→
sent→sent8.变为以-ought或-aught结尾。如：buy→
bought→
bought; bring→
brought→
brought; catch→
caught→
caught; teach→
taught→
taught句式。
1.肯定句：主语。
h**e / has +过去分词。
+其他)2.否定句：主语。
h**e / has + not +过去。
分词(+其他)3.一般疑问句：h**e/ has +主语。
过去分词(+其他)4.特殊疑问句：
特殊疑问词。
不是句子主语) +h**e / has +主语+过去分词。
+其他)2)特殊疑问词(是句子主语)+h**e / has+过去分词(+其他)already和yet都可以作为现在完成时的标志词，但它们的用法不同。
already一般用于肯定句中。如：
we h**e already cleaned up our classroom.注意：already用于疑问句中时通常表示惊奇。如：
h**e you finished your homework already? i can’t believe it.
yet一般用于疑问句和否定句中。如：
h**e you seen her yet?the bus hasn’t come yet.
活学活用。write the forms of the past tense and past participle:
drinksee
findle**e
tellwhy is mr. yang still in the teachers’
office?
maybe hehis work yet.
a. doesn’t finish
b. hasn’t finished
c. h**en’t finished
step 3 exercises
1. finish 4a and check the answers.
keys: i h**e just drunk some tea.
h**e you found it?
he has already left.
did he le**e
she has already seen the film
h**en’t told them yet
2. finish 4b and check the loves, has read, will be, finished, will write,hasn’tread3. finish 4c and check the conversations and complete the chart.
(follow the conversation on page 60)
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