4.1) My father leaves his office at 5.30. →
By 5.35
his office.
4.2) They're playing football at 11 o'clock.
→ At 11.30
football.
4.3) My little sister goes to bed at 9.30.
By 10 o'clock,...
to bed.

4.1) My father leaves his office at 5.30.

By 5.35 he has has left his office.

4.2) They're playing football at 11 o'clock.

At 11.30 they're playing football.

4.3) My little sister goes to bed at 9.30.

By 10 o'clock she has gone to bed.

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explanation:

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is there any anwser chocies