Giúp mình nha mình cảm ơn

`1.`I haven’t had my hair cut since I left her.

`2.`We haven’t gone to London for two years.

`3.`I haven’t  seen her since 2010.

`4.`I haven’t read that book since November 20th.

`5.`Minh hasn’t written to his pen pal for five months.

`6.`They haven’t talked to each other for two months.

`7.`I haven’t drunk champagne since my brother’s wedding.

`@`Form : S + last + V2/ed + time ( thời gian trong quá khứ )

`=`S + have/has not + Vpp + since/for + time

`=`It’s + time + since + S ( last ) + V2/ed

`=`The last time + S + V2/ed + was + time