for , since는 주로 현재완료 시제와 함께 쓰입니다.
for + 기간
ago는 과거시제와 함께 쓰인답니다.
she was in brazil five years ago.
she has been in brazil for three days.
she has been in brazil since monday.
for+(숫자)기간 을 쓰는데요.
예를들면 david has been in canada for six months.
we’ve been waiting for two hours.
since + 과거의 시작시점
예를들면 david has been in canada since january.
과거시간 + ago
예를들면 anna started new job three weeks ago.
my aunt has lived in australia for 15 years.
jennifer is in her dffice. she has been there since 7:00
rachel has been in brazil for three days.
stephanie and robert have been married for 20 years.
줄선지 얼마나 됐어? how long have you stayed in line?
10분정도 됐어. for about 10 minutes.
시제를 알려주는 결정적인 단서를 제공하는 역할을 합니다. 이제 판단 가능하시겠죠? 아직이라면 복습하세요~