1) How long have the children done the following? Put in since or for. — ten o`clock — two years — six months- many years

since ten o'clockfor 6 monthssince Fridayfor 2 hoursfor 2 yearsfor many yearssince I was 8since April 2. She has played the piano since last year3.They've became friends since 2008,4. They've started learning skate since last month.5.He's started to read it since Saturday.6.He's ridden a horse since he was four.7.She's playing football since 5 o'clock. since- с какого то времени.for-в течение типо, Он работает тут в течение 10 лет. He has work here for 10 years. И обычно sinсe и forупотребляются в Present Perfect. Потому что действие началось и продолжается. Пожтому «с какого то времени (since) " и " в течение (for) надеюсь все правильно