Correct

忙 vs 急忙（近义词）

/ Máng yus jímáng / 
Strokes

Definition

busy;hurry./ in haste;hurriedly

Example

用法1
1)忙 means"very much occupied or having a lot to do":
2)In the examples above,急忙 cannot be used.
1
Wǒ
我
zhè
这
liǎng
两
tiān
天
hěn
很
máng
忙
  
。

I have been busy these days.

2
Tā
他
shì
是
gè
个
dàmángrén
大忙人
  
,
nándé
难得
yǒu
有
yīdiǎnr  
一点儿
kòngxián
空闲
  
。

He is very busy,and he is not free often.

3
Māma
妈妈
zhēng
正
máng
忙
zhāo
着
gěi
给
nǚér
女儿
zhī
织
yī
一
jiàn
件
máoyī
毛衣
  
。

The mother is busy knitting a sweater for her daughter.

用法2
1)急忙 usually means"to be keyed up and hasten in action",and can be reduplicated into 急急忙忙.急忙 can be used as an attributive or adverbial but not as a predicate.But 急急忙忙 used in the pattern of 是……的 can function as a predicate(example④)：
2)Examples①②③can use 忙 instead,meaning "to hasten".Example④cannot use 忙.
4
Tīngjiàn
听见
háizi
孩子
kū
哭
  
,
māma
妈妈
jímáng
急忙
pǎo
跑
qù
去
kàn
看
  
。

The mother hurried to see what happened to her child when she heard his cry.

5
Tā
他
kàn
看
le
了
yī
一
xià
下
biǎo
表
  
,
jíjímángmáng
急急忙忙
shàngbān
上班
qù
去
le
了
  
。

He glanced at his watch and went to work hurriedly.

6
Jiàn
见
qiánbian
前边
yǒurén
有人
  
,
tā
他
jímáng
急忙
chàzhù
刹住
le
了
chē
车
  
。

When he saw a person in front of his car,he stopped the brake hurriedly.