現在完成式的六個記號
http://www.learnerhall.org/2012/11/blog-post_9202.html
文法講座 > 現在完成式 > 現在完成式的六個記號
例：他已經失業6個月了。
✓ He has been out of work for six months.
✓ He has been out of work since six months ago.
▍常搭配「現在完成式」的時間副詞
例：Alice 剛剛才餵過她兒子，但他現在好像又餓了。
Alice has just fed (= Alice's just fed ) her baby boy, but he seems to be hungry again.
➤搭配「否定現在完成式」的副詞：yet ( 尚未；還沒 )。通常放在「助動詞」have 和過去分詞p.p. 之間，但也可放句尾。
➤現在完成式問句，常搭配的副詞：yet ( 好了嗎 )、ever ( 曾經 )。通常放在「助動詞」have 和過去分詞 p.p. 之間，但 yet 也可放句尾。
例：你有撞鬼經驗嗎？
Have you ever seen a ghost?
Ⓐ My brother's had dinner, but I didn't.
Ⓑ Patty has worked here since she has married my brother.
Ⓒ I usually work in Taipei, but I've worked in Taichung since last December.
Ⓓ A: When has the store had a sale?
B: For two weeks ago.
Ⓑ 選項：現在完成式意指從 ( since ) 「過去」到現在，一段時間內所發生的動作或累積的經驗。故 since 後方需搭配「過去式」，而 since 前方才搭配「完成式」。 since she has married 應改成 since she married。
現在完成式常搭配的六個記號
▍連接詞 since ( 自從 ) +「過去式」的句子或「過去」時間
▍連接詞 since ( 自從 ) +「過去式」的句子或「過去」時間
例：從她過世到現在已經 6 年了。
It has been ten years since she died.
▍介係詞 for ( 持續 ) + 一段時間（時間長短用數字表示）
It has been ten years since she died.
▍介係詞 for ( 持續 ) + 一段時間（時間長短用數字表示）
例：他已經失業6個月了。
✓ He has been out of work for six months.
✓ He has been out of work since six months ago.
▍常搭配「現在完成式」的時間副詞
➤up to now、so far ( 到目前為止 )、lately、recently ( 近來 )，這些都常出現在句尾。
例：到目前為止，我還沒收到 Jane 的來信。
I haven't heard from Jane so far.
I haven't heard from Jane so far.
➤搭配「肯定現在完成式」的副詞：just ( 剛才 )、already ( 已經 )，通常放在「助動詞」have 和過去分詞 p.p. 之間。
例：Alice 剛剛才餵過她兒子，但他現在好像又餓了。
Alice has just fed (= Alice's just fed ) her baby boy, but he seems to be hungry again.
➤搭配「否定現在完成式」的副詞：yet ( 尚未；還沒 )。通常放在「助動詞」have 和過去分詞p.p. 之間，但也可放句尾。
例：我已經完成英文作業，但我還沒開始寫數學功課。
I have already finished (= I've already finished ) my English homework, but I haven't started ( = I've not started ) my math assignment yet.
I have already finished (= I've already finished ) my English homework, but I haven't started ( = I've not started ) my math assignment yet.
➤現在完成式問句，常搭配的副詞：yet ( 好了嗎 )、ever ( 曾經 )。通常放在「助動詞」have 和過去分詞 p.p. 之間，但 yet 也可放句尾。
例：你有撞鬼經驗嗎？
Have you ever seen a ghost?
－－－
▍選出正確的句子
Ⓑ Patty has worked here since she has married my brother.
Ⓒ I usually work in Taipei, but I've worked in Taichung since last December.
Ⓓ A: When has the store had a sale?
B: For two weeks ago.
－－－
Ⓐ 選項：My brother's had 是 My brother has had 的縮寫，所以後面應該用「現在完成式」的助動詞 have / has 造否定簡答。I didn't 應改成 I haven't。
Ⓒ 選項：since 為「現在完成式」的記號，故 Ⓒ I've worked 為正解。
Ⓓ 選項：疑問詞 when ( 何時 ) 只能問出「確切」時間，若想問出一段時間，得改用疑問詞 how long ( 多久 )。答句「兩星期了」可用 for 搭配一段時間，或用 since 搭配過去時間。
正確寫法如下：
A: How long has the store had a sale?
B: For two weeks.
A: How long has the store had a sale?
B: For two weeks.
或 Since two weeks ago.
答案：Ⓒ
