I'm Alice Bryant. The words if and whether are conjunctions that connect two or more sentences or clauses.

我是愛麗絲布萊恩特。if 和 whether 是連接詞，用來連接兩個或以上的完整句或子句。

In part one of this program, I talked about when to use the word.

在這個節目的第一部分，我談到了什麼時候用這個詞。

Whether on today's program I will talk about when if must be used and when the two words are interchangeable, we use, if in conditional sentences, we cannot use whether a conditional sentence is one that presents a condition and a result.

在今天的節目中，我是否會講到什麼時候一定要用if，什麼時候這兩個詞可以互換，我們用，如果在條件句中，我們不能用是否條件句是提出一個條件和一個結果。

In other words, when a happens be happens, here's an example.

換句話說，當一個發生是發生，這裡有一個例子。

If I won the lottery, I would buy a house in this sentence.

如果我中了彩票，我會在這句話中買房。

If I won, the lottery is the condition, and I would buy a house is the result next?

如果我中獎了，彩票是條件，接下來我會買房是結果？

Let's talk about two situations in which "if" and "whether" are interchangeable. When reporting yes or no questions, we can use "if" or "whether". Listen to two statements to see what I mean.

我來說明 if 和 whether 能互換的兩種情況。若要回答一個一般疑問句，if 和 whether 都可以用。來聽聽這兩句話，你就能理解我的意思。

He asked if I listen to music every night.

他問我是不是每天晚上都聽音樂？

He asked whether I listen to music every night.

他問我是不是每天晚上都聽音樂。

We can also use if or whether, when asking indirect yes or no questions, listen to the examples.

我們在間接問 "是 "或 "否 "的問題時，也可以用if或ever，聽聽例子。

Can you tell me if the train is coming soon?

你能告訴我火車快到了嗎？

Can you tell me whether the train is coming soon as discussed in Part one.

你能不能告訴我，火車是否如第一部分所討論的那樣，很快就會到來。

There are some exceptions.

但也有一些例外。

You can learn more about them in that program, and that's everyday grammar.

你可以在那個節目中瞭解更多，那就是日常文法。