有（一）点儿 vs （一）点儿 vs 一点儿（近义词）

1)Both 有(一)点儿 and(一)点儿mean" lite",but 有(一)点儿 is an adverb while(一)点儿is a measure word, and 一点儿 is an adverb also:
2)The adverb 有(一)点儿 mean "a low degree",mostly applied to negative or undesirable things. It is used as an adverbial in front of a verb or adjective or a phrase of similar function:
3)If it shows a certain change, it has no negative or undesirable sense:
4)Note: If 有(一)点儿 is followed by a noun or phrase of similar function,itis not an adverb but a phrase of 有 plus a measure word (一)点儿,as in examples ⑥and⑦:

1)The measure word(一)点儿 implies an indefinite small quantity:
2)Used before a noun to mean "alittle":
3)Used before an adjective to indicate a slight change or difference:
4)Used after certain verbs to show a slight increase or decrease in degree or quantity:

1)The adverb 一点儿 used in front of a negative form indicates a complete negation and 一 is absolute necessary :
2)The adverb 一点儿 can be reduplicated and mostly functions as an adverbial before a verb.一 cannot be omitted: