用“that /whether/if”造关于最喜欢的节日的句子：
I believe that whether you come or not, you will be very happy in this Spring Festival.我相信无论你来不来，你都会在这个春节里都会非常开心。
I wonder if you can come and spend the Mid-Autumn festival with me.
我想知道你是否能来和我一起度过这个中秋节。
I think that the Spring Festival is the most fun festival.
我认为春节是最有趣的节日。
I think that the Dragon Boat is in memory of Quyuan.
我认为端午节是为了纪念屈原。
I know that they like the traditional festivals is a sign showing love of the country.
他们喜欢传统节日是爱国的标志。
“that ” [ðæt; ðət] ； 那；那个；那么；那样； 因为；以至于
“that ”短语：
that is 也就是说 ; 就是说 ; 那就是说 ;
so that 以便 ; 结果是 ; 所以 ; 为使
All That 这一切 ; 到那种程度 ;
“that ”例句：
They said you particularly wanted to talk to me. Why was that?
There's a party tonight."—"Is that why you're phoning?"
“whether” ['weðə] ； 是否；不论；两个中的哪一个
“whether”短语：
Whether you 是否你 ; 不管你了 ; 不论你 ; 无论你
Whether heating 不管是加热 ; 是否加热
Whether patriotic 爱不爱
“whether”例句：
To this day, it's unclear whether he shot himself or was murdered.
Whether it turns out to be a good idea or a bad idea, we'll find out.
“if” [ɪf] ；（表条件）如果；即使；是否；（表假设）假如； 条件；设想
“if”短语：
if any 若有的话 ; 即便要 ; 如果有 ; 如果有的话
if so 如果这样 ; 如果有 ; 如果是这样的话 ; 如果这样的话
If unhindered 如入无人之境
if anything 若有任何不同的话 ; 如果有…的话 ; 如果有什么不同的话
“if”例句：
She gets very upset if I exclude her from anything.
You can go if you want.
He asked if I had left with you, and I said no.