人教版八年級英語下冊《Have you read Treasure Island yet?》SectionA PPT教學課件(第3課時)，共33頁。
Objectives
To learn the present perfect tense with“already”and“yet”.
To learn some new words: fiction, technology, French…
Grammar Focus
Have you read Little Women yet?
Yes, I have. /No, I haven’t.
Has Tina read Treasure Island yet?
Yes, she has. She thinks it’s fantastic.
Have you decided which book to write about yet?
Yes, I have. I’ve already finished reading it. It was really good.
現在完成時
用法：
1.表示過去發生或已經完成的某一動作對現在造成的影響或結果。
e.g. –Have you had your lunch yet?
–Yes, I have. I’ve just had it. (現在我不餓了。)
2. 表示動作或狀態從過去某一時刻開始，一直延續到現在，而且可能還要繼續下去。
e.g. I haven’t seen her these days.
I’ve known Bob for three years.
I’ve been at this school for over two years.
時間狀語：already, yet, just, ever, never, before
構成：現在完成時是由“助動詞have / has+ 動詞的過去分詞”構成的，規則動詞的過去分詞構成與過去式相同，不規則動詞的過去分詞則需逐個記憶。動詞的過去式的變化和過去分詞的變化并不完全相同。我們對它們作了一個大致的分類。
一、過去式和過去分詞的變化相同規則變化：
1. 一般在動詞詞尾直接加ed。如：
pick → picked → picked;
wish → wished → wished;
stay → stayed → stayed
2. 以不發音的e結尾的動詞后面加d。如：
like → liked → liked;
hope → hoped → hoped;
phone → phoned → phoned
3. 以“輔音字母 + y”結尾的動詞，變y為i，再加-ed。如：
study → studied → studied;
hurry → hurried → hurried;
reply → replied → replied
4. 詞尾只有一個輔音字母的重讀閉音節動詞，要雙寫輔音字母，再加-ed。如：
stop → stopped → stopped;
clap → clapped → clapped
不規則變化：
5. 以不變應萬變。如：
let → let → let;
put → put → put;
read → read → read
6. 若中間有雙寫e，則去掉一個e，單詞末尾再加t。如：
feel → felt → felt;
keep → kept → kept;
sleep → slept → slept
7. 末尾的字母d變t。如：
lend → lent → lent;
build → built → built;
send → sent → sent
8. 變為以-ought或-aught結尾。如：
buy → bought → bought;
bring → brought → brought;
catch → caught → caught;
teach → taught → taught
句式
1. 肯定句：主語 + have / has + 過去分詞 (+其他)
2. 否定句：主語 + have / has + not + 過去分詞(+其他)
3. 一般疑問句：have/ has + 主語 + 過去分詞(+其他)
4. 特殊疑問句：
1)特殊疑問詞 (不是句子主語) + have / has + 主語+過去分詞 (+其他)
2)特殊疑問詞(是句子主語)+have / has+ 過去分詞(+其他)
現在完成時--與already連用
already 意為“已經”，常用于肯定句中。一般置于助動詞have/has之后，過去分詞之前，但也可放在句末。
e.g. 我已經看過這部電影了。
I have already seen the film.
我已經解決了這個問題。
I have already solved this problem.
我已經做完家庭作業了。
I have finished my homework already.
yet，在現在完成時句型中常置于句末。
1) “已經”，常用在疑問句中。
e.g. 琳達已看過這本書了嗎?
Has Linda read the book yet?
你完成家庭作業了嗎？
Have you finished your homework yet?
2)“還，仍然”，常用于否定句和疑問句。
e.g. 他還未開始工作。
He has not begun to work yet.
現在完成時與一般過去時
同學們要注意現在完成時與一般過去時的區別。雖然這兩個時態都和過去發生的事情有關，但是現在完成時強調這一動作與現在的關系，如對現在產生的結果、影響等，而一般過去時只表示過去的事實，不表示和現在的關系。如：
I went home at 10:00 yesterday.
I have got home now.
我昨天十點回家的?，F在我已經到家了。
I have already finished my homework.
我已經寫完家庭作業了。
I finished my homework an hour ago.
我一個小時之前寫完了家庭作業。
Homework
Review the new words and expressions.
Make sentences using the present perfect tense with “already” and “yet”. (at least 10 sentences)
... ... ...
關鍵詞：Have you read Treasure Island yet? PPT課件免費下載，.PPTX格式；
