By the end of this week, my father will have bought a new vacuum cleaner as a gift for my mother

Đápán: By the end of this week, a new vacuum cleanerwill have been boughtas a gift for my mother by my father. 

Giảithích: Câubịđộngthìtươnglaihoànthành: S + will + have + been + Vp2 + (by O) 

Dịch: Đếncuốituầnnày, bốtôisẽmuamộtchiếcmáyhútbụimớiđểlàmquàchomẹtôi.