从前
cóngqián
Noun, long time ago
很久以前

挂着
guàzhe
Verb phrase, (something) is hanging on (somewhere)
门上挂着一个铃铛
墙上挂着一幅画

铃铛
língdāng
Noun, bell

偷
tōu
Verb, to steal
小偷，thief

明明
míngmíng
Adv, (someone knows something)clearly
她明明知道吃巧克力会发胖，晚上还吃了两包巧克力。

碰
pèng
Verb, to touch (usually without permission)
别碰我！Don’t touch me!

丁零丁零
dīngling dīngling
Onomatopoeia, the sound of a bell
铃铛“丁零丁零”地响。

响
xiǎng
Verb, (alarm, instrument) make a certain sound 

被
bèi
Passive word, Object + 被  + subject + verb/verb phrase.
铃铛被人偷了。The bell is stole by someone.

发觉
fājué
Verb, to come to know; to be aware that…

掩
yǎn
Verb, to cover

伸
shēn
Verb, to stick out

捂
wǔ
Verb, to cover 

比喻
bǐyù
Verb, to analogize;
Noun, analogy 
这个成语比喻做事要实事求是。This idiom analogizes that one should seek the truth from facts.

欺骗
qīpiàn
Verb, to lie to; to cheat
or 骗

却
què
Conjunction word, but; however 
or 可是，但是

了
liǎo
Particle word, action is complete 
去得了，can go(the action of going can be complete)
去不了, cannot go(the action of going cannot be complete)

自欺欺人
zìqīqīrén
Chengyu,  deceive oneself and [as well as] others