Ex 1: Rewrite the following sentences as the same meaning,using the words given
We have a contest in which participants have to arrange flowers ( arranging)

→We have a flower-arranging contest.

flower-arranging contest : cuộc thi cắm hoa.
Ex 2: Change these sentences into passive voice
a, they have performed this song at the festival

→This song has been performed at the festival.

S + have/has + V3 + O.

→S(O) + have/has + been + V3 + by + S.
b, Miss thanh is teaching me to draw the christmas cards

→I am being taught to draw the christmas cards by miss Thanh.

S + be + V_ing + O.

→S(O) + be + being + V3 + by + S.
c, ba will invite liz to tye rice-cooking festival

→Liz will be invited to tye rice-cooking festival by Ba.

S + will + V + O.

→S(O) + will + be + V3 + by + S.
d, we have to postpone our picnic because of the rain

→Our picnic has to be postpned by us because of the rain.

S + have/has + to + V + O.

→S(O) + have/has + to + be + V3 + by + S.