if
conj.是否；如果；即使；每当
n.条件；设想
例句
用作连词 (conj.)
Do you know if he's married?
他结婚没结婚，你知道吗？
I can give you a round neckline if you prefer.
如果您喜欢我可以给您开个圆领口。
If he wins and it's a big if he'll be the first Englishman to win for twenty years.
假使他赢了－－是否能赢还是一大疑问－－他将是二十年来第一个获胜的英国人。
She glares at me if I go near her desk.
我一走近她的办公桌，她就瞪我。
用作名词 (n.)
If these terms are not acceptable to you, we may suggest others.
如果你对这些条件不合意，我们可提出别的条件。
If she needs salvation, she will posit a savior.
如果她需要救助，她就会设想一个救助者。