В чем разница во времени в английском между "quarter" и "a quarter" если можно писать и так и так?

напр:

It's quarter past three

It's a quarter to four

Раскройте скобки, поставьте глаголы в Past Continuous: Julie (sleep) at three o'clock. You (study) at three o'clock. Luke (read) at three o'clock. I (work) at three o'clock. They (eat) chocolate at three o'clock. John (play) tennis at three o'clock.

3.6 Скажите, который час? 1. It is eleven sharp. 2 It is five minutes past three. 3. It is ten past two. 4. It is a quarter past twelve. 5. It is three o clock. 6 It is half past eight. 7. It is twenty five minutes to four. 8. It is three fifteen. 9.

Скажите, который час? 1. It is ten eleven sharp. 2. It is five minutes past three. 3. It is ten past two. 4. It is a quarter past twelve. 5. It is three o'clock. 6. It is half past eight. 7. It is twenty five minutes to four. 8. It is three fifteen.

Переведите на англ. яз. Время: Past Simple, Past Progressive, Past Perfect - эти времена к каждому предложению. 1) Мы переводили тексты вчера весь вечер.

What time is It? (ex. lt's quarter past ten - 10.15) It's quarter past nine. It's half past two. It's quarter to four.