I haven't heard from him since last week .请问这句话对吗?

I haven't heard from him since last week .请问这句话对吗? I haven't heard from him last week. He said"I haven't heard from him since May". i haven't heard from my sister since last year i haven't heard from him recently. I haven’t heard from him（ ）he left home.A、when B、since C、as I haven't heard from George (since the end of last year).(括号 I haven’t heard from her since she went abroad. I haven’t seen her since last week.意思? I haven't heard from him( )he went abroad 语法题:I haven't heard from him ( ). 将下列直接引语变间接引语she said "I haven't heard from him since may"