102年試辦國中教育會考英文科-27

27. Tommy uses chopsticks well, but his younger brothers __ , so they usually eat

with spoons.

(A) don't (B) doesn't (C) aren't (D) isn't

Tommy筷子用得很好 可是他弟弟們卻用得不好

所以他們通常用湯匙吃東西

既然前句的動詞是一般動詞uses

那否定句就要藉助動詞do/does + not 

那先刪去兩個不可能的答案

(A) don't (B) doesn't (C) aren't (D) isn't

那是用do + not 還是does + not 呢?

這取決於它前方的主詞是單數還是複數

his younger brothers是單數還是複數？

是複數

所以要用do + not （don't）