$\text{*Structure: }$

`(+)` It's + time + since + QKĐ(thể khẳng định)

`→` HTHT(thể phủ định) + for/since + time.

`→` S + last + Ved/V2 + time

`→` The last time + QKĐ(thể khẳng định) + was + time

`(?)` When did + S + V?

`→` How long is it + since + QKĐ(thể khẳng định)?

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`41.` I haven't taken photographs for years.

`42.` I haven't watched TV since new year's day.

`43.` He hasn't written to me for 3 months.

`44.` I haven't been abroad since the summer of 1978.

`45.` That house hasn't been lived in for 10 years.

`46.` I last saw him 2 months ago.

`47.` The last time I went to the concert was over a year ago.

`48.` I haven't really enjoyed myself since your birthday party.

`49.` My father hasn't seen his brother for nearly 20 years.

`50.` How long is it since you learnt to drive?

$chucbanhoctot$

$#thaonguyeneakar$

`\color{green}{#Queen}`

`41.` I haven’t taken photographs for years.

`-` $\text{It is + time + since + S + (last) + V-ed}$ 

`=>` $\text{S + have/has + not + VpII + for + time}$

`42.` I haven’t watched TV since new year's day.

`-` $\text{S + last + V-ed + time + ago}$ 

`=>` $\text{S + have/has + not + VpII + for + time}$

`43.` He hasn’t written to me for 3 months.

`-` $\text{It is + time + since + S + (last) + V-ed}$ 

`=>` $\text{S + have/has + not + VpII + for + time}$

`44.` I haven’t been abroad since the summer of 1978.

`-` $\text{The last time + S + V-ed + was + time + ago}$

`=>` $\text{S + have/has + not + VpII + for + time}$

`45.` That house hasn't been lived for 10 years.

`-` $\text{It is + time + since + S + (last) + V-ed}$ 

`=>` $\text{S + have/has + not + VpII + for + time}$

`46.` I last saw him 2 months ago.

`-` $\text{S + have/has + not + VpII + for + time}$

`=>` $\text{S + last + V-ed + time + ago}$ 

`47.`  The last time I went to the concert was over a year ago.

`-` $\text{S + have/has + not + VpII + for + time}$

`=>` $\text{The last time + S + V-ed + was + time + ago}$

`48.` I haven’t really enjoyed myself since your birthday party.

`-` $\text{The last time + S + V-ed + was + time + ago}$

`=>` $\text{S + have/has + not + VpII + for + time}$

`49.` My father hasn’t seen his brother for nearly 20 years.

`-` $\text{It is + time + since + S + (last) + V-ed}$ 

`=>` $\text{S + have/has + not + VpII + for + time}$