want to know if he needs any help

want to know if he needs any help
请问这的if为社么是“是否”而不是如果?

selinda520 1年前已收到5个回答举报

规则粉碎机幼苗

共回答了23个问题采纳率：91.3% 举报

i want to know if he needs any help
这是宾语从句,从句是 he needs any help
这里if就是是否的意思,如果后面没有“or not”,可和whether替换.是if的另一种意思用法

1年前

yizhuowang 花朵

共回答了7530个问题举报

if 有两个含义，一个是“是否”，一个是“如果”，
为什么是“是否”很简单，因为“如果”在这里行不通

1年前

xxh23673547 幼苗

共回答了4个问题举报

用如果语句不通，是否符合语境，跟语法没联系吧！

1年前

benan 幼苗

共回答了3个问题举报

如果;if 用作为如果，常用作为主将从现。
如：We'll go to the supermarket if it doesn't rain
(但请你注意：1.主句可以用祈使句来表示将来时，这时主句用一般现在时 Put on your coat if you feel cold
2.是真理的话，前后都用一般现在时)
解释为是否时，用法同wh...

1年前

环翠楼幼苗

共回答了1个问题举报

额……if它有是否的意思可已有如果的意思，至于是哪个，那要看题意

1年前

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你能帮帮他们吗

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