the last time jimmy called james was 6 months ago

Jimmy hasn't called James for 6 months

It's 6 months since Jimmy last called James

Trans : lần cuối cùng Jimmy gọi cho James là 6 tháng trước

            `->`  Jimmy đã không gọi cho James suốt 6 tháng

for + khoảng thời gian `=>` thì HTHT : S + have/has + V3/ed

`EKI2k7`

`-` It's 6 months since Jimmy last called James.

`-` Jimmy last called James 6 months ago.

`-` Jimmy hasn't called James for 6 months.

`××××××××××××`

`+` The last time + S + Ved + was + thời gian + ago.

`=` It + is/has been + thời gian + since + S + last + Ved

`=` S + last + Ved + thời gian + ago

`=` S + hasn't/haven't + P2 + since/for....