What is different between 一起 and 一块儿?

"一起" 和 "一块儿" 都表示一起、一同的意思，但在使用上有一些细微的差别，特别是从语法角度来看。以下是它们的区别和例子：

1. "一起"：
"一起" 是较为通用的表达方式，用来表示人或事物在同一时间或同一地点一同进行或存在。
"一起" 可以用在动词前，表示动作的共同性。
例句：
我们一起去看电影吧。
他们一起学习汉语。

2. "一块儿"：
"一块儿" 与 "一起" 含义相似，但它通常用来表示人或事物在同一地点、同一时间一同存在或进行。
"一块儿" 常常用在名词后作状语，表示人或事物的共同性。
例句：
我们去公园玩儿吧，一块儿走吧！
他们都喜欢运动，经常一块儿去健身房。
从语法角度的区别：

注意！
"一起" 通常用在动词前，可以直接修饰动作。
"一块儿" 通常用在名词后，作状语，表示名词所指的人或事物在同一地点、同一时间共同存在或进行。

总结：
"一起" 和 "一块儿" 都可以表示一同、一起的意思，选择使用哪个取决于语境和个人偏好。
"一起" 可以用在动词前，而 "一块儿" 则通常用在名词后，作状语。
从语法角度来看，它们主要的区别在于修饰的对象。

一起和一块儿的意思基本都是一样的，唯一的区别就是，一起可以是书面语也可以说口头语，但一块儿基本都是口头语比较多，书面语很少用一块儿。
The meaning of them basically the same, the only difference is that “一起” can be written or spoken, but“一块儿”is basically more spoken, and the written language is rarely used.

Both "一起" (yīqǐ) and "一块儿" (yīkuàir) are Mandarin Chinese expressions that convey the idea of doing something together or being in the same place. However, "一起" is widely used for doing things together in various contexts. At the same time, "一块儿" is a bit more informal and often emphasises being in the same place or doing something physically together. The choice between the two can also be influenced by regional language preferences.
More specifically:
* 一起 (yīqǐ): is the more commonly used expression for "together."
It's a versatile term used in various contexts to indicate doing something jointly with others.
It can refer to both physical activities and abstract actions.
Example: 我们一起去看电影吧。 (Wǒmen yīqǐ qù kàn diànyǐng ba.) - Let's go watch a movie together.
一块儿 (yīkuàir):

* "一块儿" is a more colloquial or informal way of saying "together." It's often used in spoken language.
It's commonly used in Northern Chinese dialects and is more prevalent in those regions.
While it can also refer to doing something together, it's more often associated with physical presence or being in the same place.
Example: 我们今天晚上一块儿吃饭吧。 (Wǒmen jīntiān wǎnshàng yīkuàir chīfàn ba.) - Let's have dinner together tonight.

1. 名词用法
一起：表示在同一个地方。 这些东西可以放在一起。
一块儿：同一个地方，多用于口语。 衣服放一块儿洗了吧。
2. 副词用法
一起：一同，合起来 这件衣服太脏，不能跟别的一起洗。
一块儿：一同，多用于口语 今天晚上咱们一块儿吃个饭吧。

所以”一起“和”一块儿 ”意思基本一样，只不过“一块儿“多用于口语。

Both 一起 (yīqǐ) and 一块儿 (yīkuàir) are Chinese expressions used to indicate doing something "together," but they are used in slightly different contexts and have different nuances:

一起 (yīqǐ):
一起 is a more common and general term for expressing the idea of doing something together. It can be used in various situations and doesn't carry any specific connotations. It simply means engaging in an activity or being in a particular situation alongside others.

一块儿 (yīkuàir):
一块儿 is a colloquial and informal way of saying "together." It's often used in casual conversations and can convey a sense of camaraderie, unity, or closeness between the people involved. This term is commonly used in northern Chinese dialects and has become a part of everyday language.

In essence, both expressions convey the concept of being together, but 一块儿 adds a bit of informal and friendly tone to the expression. The choice between the two depends on the formality of the situation and the level of closeness you want to convey.

Examples:

你们想一起吃饭吗？ (Nǐmen xiǎng yīqǐ chīfàn ma?) Do you want to eat together?
我们一块儿去看电影吧！ (Wǒmen yīkuàir qù kàn diànyǐng ba!) Let's go watch a movie together!

They both means together, but 一起 is a little bit formal, 一块儿 is more informal.

平常說話的時候speaking..... 一起和一塊兒是一樣的。我喜歡和他一起上學。我喜歡和他一塊兒上學。
writing 寫作時，我喜歡和他一起上學。

一块儿 is more causual and informal
一块儿 can also mean a small piece of something 一块儿肥皂

一起，一块儿 tienen mismos significados(juntos), sólo que 一块儿es coloquial. 我们一起/一块儿去吧！

意思基本一样：
1.当用后面接动词时 ：一起 比较正式。一块儿 偏北方口语化。
例如：我们一起去逛街。 我们一块儿去逛街。

2.一块儿 做量词使用。例如：一块儿糖，一块儿饼干，一块儿肉 等等。