Not "You are tired? (this is still a statement)" — say "Are you tired? (now it asks)". 顺序决定了是不是疑问句，把 be 动词移到最前面。
试一试: You are tired. 把这句话变成疑问句。 答案: Are you tired? — 是非疑问句里，be 动词跳到最前面：Are you tired? "You are tired?" 还是陈述句，是顺序决定了是不是疑问句。
以疑问词开头
用 where / what / who 加 be 提问时，疑问词放最前面，然后是 be 动词。每个疑问词问的东西都不一样：where 问地点，what 问事物，who 问人。
Amina is at home. → Where is Amina?
This is a cat. → What is this?
She is happy. → Who is happy?
Not "Where Amina is? (this is the statement order)" — say "Where is Amina? (question word first, then is)". 先放疑问词，再把 is 移到名字前面。
试一试: Amina is somewhere. 问一问 Amina 在哪里。 答案: Where is Amina? — 疑问句里 is 放在 Amina 前面：Where is Amina? "Where Amina is" 是陈述句的顺序。
Where is Amina? — She is at home.
What is this? — It is a cat.
Who is happy? — Amina is happy.
Where — asks about a place
What — asks about a thing
Who — asks about a person
问别人做什么
问某人做什么，先说疑问词，再说 do 或 does，然后是动词原形。he、she、it 用 does；you、we、they 用 do。疑问词可以是 where（地点）、what（事物）或 when（时间）。
Amina lives somewhere. → Where does Amina live?
They live somewhere. → Where do they live?
Mei likes something. → What does Mei like?
Mei reads at some time. → When does Mei read?
Not "Where Amina lives? (this is the statement order)" — say "Where does Amina live? (with does, the action word is plain)". does 后面用动词原形：live，不是 "lives"。
be 动词还是动作词？
先看看这个句子。如果它已经有 is / are / am，就把那个 be 动词移到最前面：She is happy. → Is she happy? 如果它有像 work, live, read 这样的动作词，就用 do 或 does：She works. → Does she work?
She is happy. → Is she happy? (has is)
She works. → Does she work? (has an action word)
They are ready. → Are they ready? (has are)
They live here. → Do they live here? (has an action word)
Not "Is she work? (there is no be-word in "She works")" — say "Does she work? (an action word needs does)". 句子里没有 is / are / am？那就用 do 或 does，不是 be 动词。
试一试: Make "She works." a question. Which one is correct? (Does she work? / Is she work? / Do she work?) 答案: Does she work? — "She works" 里是动作词，没有 is / are / am，所以用 does：Does she work? "Is she work?" 用了句子里根本没有的 be 动词，而 "Do she work?" 里的 she 需要的是 does。
试一试: Make "She is happy." a question. Which one is correct? (Is she happy? / Does she happy? / Does she be happy?) 答案: Is she happy? — "She is happy" 已经有 be 动词 is 了，所以把它移到最前面：Is she happy? 这里没有动作词，所以用不上 does。
试一试: Amina lives somewhere. 问一问 Amina 住在哪里。 答案: Where does Amina live? — 先说 Where，再说 does，然后是动词原形 live：Where does Amina live? does 在前面时，动词保持原形。
试一试: They live somewhere. 问一问他们住在哪里。 答案: Where do they live? — they 要用 do（不是 does）：Where do they live? does 留给 he、she、it 用。两种情况动词后面都保持原形。
试一试: Mei reads at some time. 问一问 Mei 什么时候看书。 答案: When does Mei read? — 先说 When，再说 does，然后是动词原形 read：When does Mei read? does 在前面时，动词保持原形。