问:_______birds are there? 答:There are four birds on the tree.

C有多少

C.How many
birds 是可数名词，故用how many修饰，how much修饰不可数名词

C

c

C.How many

可数名词用many,不可数名词用much

C how many``

:_______birds are there?
：There are four birds on the tree.

对数字FOUR的提问 可数 所以用HOW MANY``

对频率的提问 用 How often ..
对价格的提问 用 How much...