When do I use 量词?
Do I only use 量词 (counter word) for 一？ Or for all numbers?
Ex: 一座山，二座山，三座山？

Question

When do I use 量词?
Do I only use 量词 (counter word) for 一？ Or for all numbers?
Ex: 一座山， 二座山，三座山？

Answer

for all numbers and sometimes demonstrative pronoun
一座山，2个人，三朵花，4栋房子
那个人，这辆车 ect

Answer

“量词” is confusing even to some Chinese child

Answer

sometimes we do not use 量词 for numbers if the word is a noun.e.g.三轮车 双人床 double bed  双means two.     e.g三人行必有我师 a chinese old saying.e.g. if you booked a ticket for one person.how much for one person? 一人多少钱？or 一个人多少钱?are both ok

Answer

all numbers including 一 u must use 量词
furthremore, for 许多（some） and other words like this  u must use 量词 too

Answer

yes what you said is right.一个苹果 两个苹果 三个苹果is like one apple two apples three apples.and the only way to handle them is accumulating.good luck~