在be going to結構中，to通常是不可省略的，因為它是表示目的或意圖的介詞。然而，在某些情況下，to可以省略，具體取決於上下文和口語風格。

以下是一些情況下可以省略to的例子：

1. 口語風格：在口語中，特別是非正式場合，to經常被省略。例如：

- I'm gonna (going to) buy a new car.（我要買輛新車。）

- We're gonna (going to) have dinner together.（我們要一起吃晚飯。）

2. 動詞後跟賓語：當動詞後緊跟賓語時，有時可以省略to。例如：

- I'm going to visit my friend. → I'm going to visit my friend.（我要去拜訪我的朋友。）

- He's going to join the club. → He's going to join the club.（他要加入俱樂部。）

請注意，to的省略與動詞的變化無關，只是針對be going to結構中的to進行省略。要正確使用be going to結構，請根據上下文和語境判斷是否需要使用to，以確保表達清晰準確。

總之，雖然在特定情況下可以省略to，但在正式寫作和嚴謹場合下，建議保留to以確保語法正確性和表達清晰度。

gonna 是 going to 的縮寫,原本是 be going to。⽤法是 S + be + gonna + 原形動詞。

注意以下為非正式的寫法，不適合出現在書面語中。

1、單詞 + to

going to = gonna

want to = wanna

wants to = wansta

got to = gotta

have to = hafta

has to = hasta

1）going to縮略為gonna，be going to to sth表示一般將來時，其縮略形式為be gonna do sth，不能省略be動詞。

2）got to縮略為gotta，可用於have got to sth/have gotta do sth中，表示“不得不做某事、必須做某事”；口語中也可省略have，用got to do sth/gotta do sth表示同樣的意思。

例句：

You wanna go?

I hafta do it today.

Then I've gotta go.

You knew this was gonna happen.

You've gotta find a way to get along.

She hasta believe him. She hasta believe him.

I wanna go to the cinema. She wansta come with me.

2、單詞 + of

out of = outta

sort of = sorta

kind of = kinda

lot of = lotta

例句：

Kinda busy right now.

Isn't that kinda like cheating?

A lotta people are outta work.

It sorta seems like you might be a liar.

So I'm gonna ask you to step outta my space.

3、單詞 + you

口語中，you常與其他單詞縮略為-ya或-a。美語中，you也常與all縮略為y'all。

catch you = catcha

get you = getcha

got you = gotcha

bet you = betcha（表示“我敢跟你打賭）

want you = wantcha

don't you = dontcha/don'tcha

did you = d'ya

what are/do/have you = whatcha

例句：

D'ya wanna go?

What brings y'all to Texas?

But yeah, y'all look gorgeous.

Whatcha doing this weekend?

Let me... Let me getcha some wine.

Gotcha. You're safe now, little turtle.

I betcha everybody in here has a story.

Again, dontcha want to go to the beach with me?

4、單詞 + me

give me = gimme

let me = lemme

例句：

Lemme see that.

Come on. Lemme have it.

Yep, just gimme like five minutes.

Come on, man, just gimme...gimme a break.

5、單詞 + have

have在口語和書面語中可縮略為-'ve；在非正式的口語中，情態動詞還可與have縮略為-a，例如，could have縮略為coulda。

could have = coulda

should have = shoulda

would have = woulda

might have = mighta

must have = musta

例句：

I shoulda used the powder.

She mighta gone to the bank today.

No, musta been a really long time ago.

What? Ok, I coulda bought you one anyway!

They woulda come to the plantation this past year.

I probably coulda come up with something much better.