حروف اضافه‌ی زمان: at و on (A1)

این جفت رو یاد بگیر: at + ساعت.

at = ساعت

Our class is at seven o'clock.
We eat at noon.
I am at the center at four-thirty.
Not "Our class is on seven o'clock." — say "Our class is at seven o'clock.". ساعت با at می‌آد، نه «on».
خودت امتحان کن: Ethan: Come early. The center is open ___ eight-thirty. (at / on / in) جواب: at — Eight-thirty یه ساعته، و ساعت با at می‌آد. «On» با روز می‌آد، و «in» با یه بخش از روز.

این جفت رو یاد بگیر: on + یکی از روزهای هفته.

We have class on Monday.
The center is closed on Sunday.
I see my friends on the weekend.
Not "We have class at Monday." — say "We have class on Monday.". روز با on می‌آد، نه «at».
خودت امتحان کن: Maya: Bring your book. The art class is ___ Friday. (on / at / in) جواب: on — Friday یکی از روزهای هفته‌ست، و روز با on می‌آد. «At» با ساعت می‌آد، و «in» با یه بخش از روز.

این‌ها رو یاد بگیر: in the morning / afternoon / evening، ولی at night.

I study in the morning.
We have class in the afternoon.
The center is closed at night.
Not "The center is closed in night." — say "The center is closed at night.". می‌گیم in the morning / afternoon / evening، ولی برای شب می‌گیم at night.
خودت امتحان کن: Maya: I draw my pictures ___ night. It is quiet then. (at / in / on) جواب: at — Night تنها بخشی از روزه که at می‌گیره. صبح و بعدازظهر و عصر همه‌شون in می‌گیرن.

برای پرسیدن زمان، با When is شروع کن. جوابش می‌تونه روز و ساعت رو با هم بگه.

When is the class? — On Monday, at seven.
When is your class? — On Saturday, at noon.
When is the next one? — In the afternoon.
Not "When are the class?" — say "When is the class?". یه کلاس یعنی یه چیز، پس سؤال is می‌گیره: When is the class?
خودت امتحان کن: Ethan: ___ Maya: On Wednesday, at a quarter after ten. سؤال Ethan رو انتخاب کن. (When is the class? / Where is the class? / Who is the class?) جواب: When is the class? — Maya با یه روز و یه ساعت جواب می‌ده، پس Ethan پرسیده When is the class? با «Where» جوابت یه مکان می‌شد، و با «who» یه آدم.
خودت امتحان کن: Ethan: Come after the last class. We are free ___ the evening. (in / at / on) جواب: in — عصر یه بخش از روزه، و این بخش‌ها in می‌گیرن. «At» برای شب یا ساعت درسته، و «on» برای یه روز مثل Sunday.

نادرست	درست	چرا
Our class is on seven o'clock.	Our class is at seven o'clock.	ساعت با at می‌آد، نه «on».
We have class at Monday.	We have class on Monday.	روز با on می‌آد، نه «at».
The center is closed in night.	The center is closed at night.	می‌گیم in the morning / afternoon / evening، ولی برای شب می‌گیم at night.
When are the class?	When is the class?	یه کلاس یعنی یه چیز، پس سؤال is می‌گیره: When is the class?