Correct

一道 vs 一块儿 vs 一起 vs 一同

/ yīdào vs yīkuàir vs yīqǐ vs yītóng /
Strokes

Definition

一道, 一块儿, 一起 and 一同 all means “together".

一道 is an Adverb,

一块儿 is an Adverb or a Noun,

一起 is an Adverb or a Noun,

一同 is an Adverb.

Example

The Adverbs 一道,一块儿,一起,一同 all mean "two or more people or things do something or be treated in the same way".
There is usually 跟 or 同 in front to form a preposition and object phrase.

一道 is a southern expression, 一同 is literary, 一块儿 and 一起 are colloquial, and 一块儿 is mainly used in spoken language.

Any of the four words can be used in all the examples, but with different local flavors.
1
Zánmen
咱们
dào
一道
  
(
kuàir  
块儿
  
)
  
(
一起
  
)
  
(
tóng
一同
  
)
shōushi
收拾
xià
fángjiān
房间
  

Lets put the room in order.

2
Xiàtiān
夏天
zǒngshì
总是
gēn
jiějie
姐姐
dào
  
(
kuàir  
块儿
  
)
  
(
一起
  
)
  
(
tóng
一同
  
)
yóuyǒng
游泳
  

I always go swimming with my sister in summer.

3
Xiǎowáng
小王
tóng
lǎo
老李
dào
一道
  
(
kuàir  
块儿
  
)
  
(
一起
  
)
  
(
tóng
一同
  
)
shànghǎi
上海
le
  

Xiao Wang and Lao Li have gone to Shanghai together.

4
rènshi
认识
  
,
zuìhǎo
最好
zhǎo
rén
个人
dào
一道
  
(
kuàir  
块儿
  
)
  
(
一起
  
)
  
(
tóng
一同
  
)
  

You don't know how to get there, so you'd better ask somebody to go with you.

5
Zhè
ge
rén
wèn
问题
jīntiān
今天
yào
dào
  
(
kuàir  
块儿
  
)
  
(
一起
  
)
  
(
tóng
一同
  
)
tǎolùn
讨论
  

There issues will be discussed together today.

6
Děng
xìn
xiě
wán
  
,
men
我们
dào
一道
  
(
kuàir  
块儿
  
)
  
(
一起
  
)
  
(
tóng
一同
  
)
  

Please post your and my letters together after you finshed it.

7
Qǐng
yīn
录音机
gēn
dài
磁带
dào
一道
  
(
kuàir  
块儿
  
)
  
(
一起
  
)
  
(
tóng
一同
  
)
gěi
dàilái
带来
  

Please bring me the tape recorder along with the tape.

The Noun 一块儿 or 一起 indicates the same place and is usually used after the words 在 or 到.
In the examples, neither一道 nor 一同 can be used.

Sometimes 一道 is 一 plus 道,e.g.口袋漏了, 米洒了一道 (The sack split and the rice is scattered along the road).
8
Zhè
ge
háizi
女孩子
zǒng
zài
kuàir  
块儿
  
(
一起
  
)
wán
  

These girls are always playing together.

9
Biè
zhè
běn
zhì
杂志
fàngdào
放到
kuàir  
块儿
  
(
一起
  
)
  

Don't put the magazines in the same place.

10
lǎo
老李
zǎojiù
早就
rènshi
认识
  
,
men
我们
zài
kuàir  
块儿
  
(
一起
  
)
gōngzuò
工作
guò
  

I knew Lao Li for a long time, for we were once colleagues.

11
men
我们
xíng
旅行
shí
dào
遇到
kuàir  
块儿
  
(
一起
  
)
le
  

We met in a tour.

12
men
他们
xīong
兄弟
èr
rén
zài
kuàir  
块儿
  
(
一起
  
)
zhù
  

The two brothers live together.