Adverb Clauses — بخش اول (فصل ۱۶)
Clause یعنی چی؟ و ساختار Adverb Clause
Clause یعنی تکهای از جمله که subject + verb داره — یا independent است (خودش جملهی کامله) یا dependent (نمیتونه تنها بایسته، باید به جملهی اصلی وصل بشه). Adverb clause یک نوع dependent clause است که مثل قید، اطلاعاتی دربارهی زمان، دلیل، شرط یا تضاد میده.
ساختار: Adverb Clause + کاما + Main Clause، یا Main Clause + Adverb Clause (بدون کاما).
- After it got dark, the fireworks display began. (اول جمله ← کاما)
- The fireworks display began after it got dark. (آخر جمله ← بدون کاما)
تلهی Fragment: adverb clause بهتنهایی نمیتونه جملهی کامل باشه. غلط: After the movie ended. درست: After the movie ended, the audience stayed in their seats یا The audience stayed in their seats after the movie ended. دو تلهی دیگه: comma splice (دو جملهی مستقل با کاما به هم وصل بشن، بدون حرف ربط — مثلاً After the movie ended, we went home, it was late) و فراموشکردن کاما وقتی adverb clause اول جمله میآد (After the movie ended we went home بدون کاما).
قاعدهی نقطهگذاری روشنه: اگر adverb clause اول جمله بیاد، کاما بعدش الزامیه؛ اگر آخر جمله بیاد، معمولاً کاما نمیخواد. مثالهای بیشتر: Because it was New Year's Eve, thousands of people came to watch / Everyone had good views although it was very crowded.
Time Clauses — جملههای زمانی
کلمات رایج: after, before, when, while, as, since, until/till, as soon as, by the time, whenever, once
تلهی خطرناک whenever: whenever فقط برای رویدادهای تکراری بهکار میره، نه برای یک رویداد یکبار مثل مرگ، تولد یا ازدواج. غلط: Whenever Josh died, his family was very sad. درست: When Josh died, his family was very sad. در برابر: Whenever I see that movie, I cry (تکراری، درست است). / Whenever I graduate from a course, I celebrate (تکراری) در برابر When I graduated, I was very happy (یکبار، رویداد مشخص). مثالهای بیشتر زمانی: After the rain stopped, we went outside. / Before the test started, I reviewed my notes.
Clauses of Reason — جملههای دلیل
کلمات: because, since, as, now that, inasmuch as (رسمی)
تلهی حیاتی: because دلیل رو معرفی میکنه، نه نتیجه رو. غلط: Because Rosa inherited a large amount of money from her parents, she was an only child — اینجا نتیجه (ارث بردن) قبل از دلیل (تکفرزند بودن) اومده که منطقاً غلطه. درست: Because Rosa was an only child, she inherited a large amount of money.
مثالهای صحیح: Because it was raining, we stayed inside. / Since she studied hard, she passed the exam. / As I was tired, I went to bed early. / Now that I graduated, I need to look for a job. برای تشخیص جابجایی علت و نتیجه، همیشه بپرس «کدوم اول اتفاق افتاد؟» — مثلاً در Because I got a promotion, I worked hard، منطقاً اول باید سخت کار کرده باشی تا ارتقا بگیری، پس جمله باید برعکس بشه: Because I worked hard, I got a promotion.
Contrast Clauses — جملههای تضاد
کلمات: although, though (غیررسمیتر)، even though, while (تضاد)، whereas (رسمی)
قانون طلایی: هیچوقت نمیشه در یک جمله هم although/even though و هم but استفاده کرد. غلط: Although I studied hard, but I failed the exam. درست: Although I studied hard, I failed the exam یا I studied hard, but I failed the exam. همین قاعده برای even though + yet هم صادقه.
مثالها: Although the movie is very popular, I don't think the theater will be crowded. / Even though it was raining, we went for a walk. / While some people enjoy being online a lot, others prefer face-to-face interaction. / Whereas my brother loves sports, I prefer reading.
Clauses of Purpose — جملههای هدف
کلمات: so that (تا اینکه)، in order that (رسمیتر). توجه: in order to یک clause نیست، بلکه infinitive phrase است.
تلهی so که ≠ so that: so + adjective/adverb یعنی «آنقدر...که» (نتیجه)، اما so that + clause یعنی «برای اینکه» (هدف): I was so tired that I slept در برابر I studied so that I could pass the exam.
بعد از so that معمولاً یک modal میآد که با زمان جملهی اصلی هماهنگه: حال/آینده ← can/will/may؛ گذشته ← could/would/might. غلط: She saved money so that she can buy a car (وقتی جملهی اصلی گذشته است). درست: She saved money so that she could buy a car.
تفاوت so that با in order to: so that + subject + verb (جملهی کامل)، در برابر in order to + verb (بدون subject): She studied hard so that she could graduate = She studied hard in order to graduate. غلط: She studied hard in order to she could graduate (بعد از in order to نمیشه subject جدا آورد).
Clauses of Condition — جملههای شرطی
کلمات: if, unless, only if, even if, provided (that), as long as, in case
تلهی پرتکرار — Unless = If...Not: بعد از unless هرگز not نمیآد، چون خودش قبلاً منفیه. غلط: Unless you don't study, you will fail (دو نفی، معنی غلط). درست: Unless you study, you will fail = If you don't study, you will fail.
تفاوت even if (فرضی، شاید اتفاق نیفته) و even though (واقعی، اتفاق افتاده): Even though it was cold, we went swimming (واقعاً سرد بود) در برابر Even if it is cold tomorrow, we will go swimming (نمیدونیم سرد میشه یا نه).
تفاوت if (شرط مستقیم) و in case (احتیاط برای آیندهی نامعلوم): Take an umbrella in case it rains (احتیاطاً، چتر میبریم چون شاید بارون بیاد) در برابر Take an umbrella if it rains (فقط اگر بارون اومد، آنوقت چتر بیار).
Reduction of Adverb Clauses — کوتاهسازی
وقتی subject در هر دو clause یکی باشه، میشه adverb clause رو به یک phrase کوتاه کرد.
قانون اول: subject هر دو clause باید یکی باشه. While she was cooking, he set the table (دو subject متفاوت) نمیشه کوتاه کرد؛ اما While she was cooking, she listened to music (یک subject) میشه: While cooking, she listened to music.
قانون دوم: subject و فعل be حذف میشن. با فعل be، فقط adjective میمونه: Although he is tired → Although tired. با فعل عادی (بدون be)، فعل به -ing تبدیل میشه: After I finished the work → After finishing the work / Before she left the house → Before leaving the house. با perfect (had + p.p.)، به having + p.p. تبدیل میشه: After he had eaten → After having eaten.
تلهی dangling modifier: اگه subject دو clause یکی نباشه، کوتاهسازی باعث ابهام میشه. غلط: While walking to school, it started to rain (کی داشت راه میرفت؟ نامشخصه، چون subject جملهی دوم «it» است). درست: While I was walking to school, it started to rain یا While walking to school, I got wet.
Upon / On + -ing و While/As در برابر When
Upon/On + verb-ing یعنی «به محض اینکه» و فقط برای رویدادهای فوری بهکار میره: Upon arriving home, she immediately called her mother. اگه فاصلهی زمانی بین دو عمل باشه، باید از after استفاده کرد، نه upon.
تفاوتهای ظریف: when برای عمل کوتاه در حین عمل طولانی (When I called, she was sleeping)، while/as برای دو عمل همزمان و طولانی (While I was reading, she was cooking)، و as برای تغییر تدریجی همزمان (As the sun set, the sky turned orange / As I get older, I understand more) — این کاربرد رو نمیشه با while یا when جایگزین کرد.
ترکیبهای Ever — Wherever, Whenever, However, Whatever
| کلمه | معنی | مثال |
|---|---|---|
| wherever | هر جا که | Wherever she goes, I follow. |
| whenever | هر وقت که | Whenever I see him, I smile. |
| however | به هر شکلی که | However you do it, do it well. |
| whatever | هر چیزی که | Whatever you decide, I support you. |
تلهی however ≠ but: وقتی however بهعنوان adverb clause میآد، باید بعدش adjective یا adverb بیاد، نه subject. غلط: However he was tired, he continued. درست: However tired he was, he continued (however + sad/tired + subject + verb).