热心网友
二楼说的是对的，但为了加强语气，建议把for 改成 becauseWe couldn't turn left just now, because a policeman was there.ps: police 后面用复数的原因是它是一个集体名词，如people
热心网友
I could not turn left for a policeman just now.
热心网友
Don't turn left, considering the policeman just now.
热心网友
the police后要用 were, can't 应改成couldn't .或者说 We couldn't turn left just now, for a policeman was there.
热心网友
The police was there just now, so you can't turn left.