$\text{40.}$ I haven't taken photographs for years.

$\text{41.}$ I haven't watched TV since new year's day.

$\text{42.}$ He hasn't written to me for 3 months.

$\text{43.}$ I haven't been abroad since the summer of 1978.

$\text{44.}$ That house hasn't been lived in for 10 years.

$\text{45.}$ I last saw him 2 months ago.

$\text{47.}$ I haven't really enjoyed myself since your birthday party.

$\text{48.}$ My father hasn't seen his brother for nearly 20 years.

$\text{49.}$ How long is it since you learnt to drive?

$\text{50.}$ I haven't gone swimming since we were in Spain.

$\text{51.}$ It's weeks since you last tidied this room.

$\text{* Form:}$

$\text{(+)}$ It's + time + since + QKD<khẳng định>

$\text{→}$ HTHT<phủ định> + for/ since + time.

$\text{→}$ S + last + Ved/ V2 + time

$\text{→}$ The last time + QKD<khẳng định> + was + time

$\text{(?)}$ When did + S + V<infi>?

$\text{→}$ How long is it + since + QKD<khẳng định>?