Multiplicative Numberals / 倍數詞

half a + N or a half + N
half a day = a half day

half of 可數N 複數V
all of + 不可數N + 單數V
Half of money was stole.
He was half sleep.
Little boy was half of dead from hunger.

Double
I am double her weight.
Sales doubled in the last five month.
When you drink too much, you something see double.
I posted a double page advertisement.
He led a double left.

half / twice / double / three times / four times + the (my/your/their)
The manager earns four times my salary.

倍數詞 as + adj(adv) + as
Their hours is about 3 times as big as ours.
Jason jumped twice as high as Greg.
This watch is five times as expensive as that one.

倍數詞 + more than
This watch is five times more expensive than that one.