■ childish 与 childlike

前者是“幼稚”（有贬义），后者是“童真可爱”。

• Don't be so childish!别这样孩子气！
• I thought her nice but rather childish.我觉得她很不错，但相当孩子气。
• She looked at us with her big, childlike eyes.她一双天真烂漫的大眼睛看着我们（-ish 常常有贬义，-like 则常常不褒不贬，甚至带有一点欣赏的语气）。

• fetch
• few
• few
• fewer
• fewer
• fewer 与 less
• few 与 little
• fill
• find
• fine
• fine print
• finger
• finish
• first
• first time
• fit
• fit, fitted, suitable, suited
• fitted
• fix
• flag
• flag 与 banner
• flammable
• flammable 与 inflammable
• flatter
• flee