I make a big cake yesterday.（改为被动语态和划线部分（划线部分是「a」）提问）？急需啊！？

首先指出这句话一个小小的不妥之处：
既然发生在“yesterday”，那么应使用一般过去时，正确的表达应该是：
I made(不是“make”) a big cake yesterday.
如果你们还没学到一般过去时，那么应该把“yesterday”改为“today”，使用一般现在时:
I make a big cake today.

被动语态：
一般过去时：A big cake was made (by me) yesterday.
一般现在时：A big cake is made (by me) today.
被动语态是指句子的主语是动作的承受者，由“助动词be(am/is/are)+过去分词”构成。至于动作的执行者，如果不是十分强调的话可以不必写出来，如果确要写出来，就用“by+执行者"。例：
主动：She tells me a story. 被动：I am told a story by her.
主动：I cut my finger. 被动：My finger is cut.
主动：He reads the book. 被动：The book is read by him.
原句“I made a big cake yesterday.”的动作是“make(made的原型)"，执行这个动作的是“I”，承受这个动作的是“a big cake”。
要变为被动语态就先把动作的承受者“a big cake”提上来做句子的主语，把动作“make”变为过去分词“made”，中间用适当的助动词连接起来。

划线部分提问：
主动语态的提问(I made a big cake yesterday./ I make a big cake today.)：
一般过去时：How many big cakes did i make yesterday?
一般现在时：How many big cakes do i make today?
被动语态的提问(A big cake was made yesterday./A big cake is made today.)：
一般过去时：How many big cakes were made (by me) yesterday?
一般现在时：How many big cakes are made (by me) yesterday?
划线部分“a”指的是数量，问数量使用“how many”，跟在“how many”后面的要用复数形式，因为提问者事前不能知道是否只有一个。

I made a big cake yesterday. 被动：a big cake was made by me yesterday.
How many cakes did you make yesterday?

how big is the cake you made yesterday？

A big cake was made (by me) yesterday.

望及时采纳。。。