how many,what time,how long,how often,这些疑问句后的句子用陈述语序吗?什么疑问句后面加陈述句呢那要不要在这些问句后面加did/do或者is/are之类的呢?比如what time you get up?还是what time do you get up?

疑问句有两种语序：陈述语序和倒装语序。有两种情况用陈述语序：
1 当疑问词在句子作主语时，句子用陈述语序。如 Who likes this bike? 疑问词who在句子作主语
2 当疑问词在句子作主语的定语时，句子用陈述语序。如 Which teacher lives here? 疑问词which 作主语teacher的定语。
除了上述情况以外，其他一律用倒装语序，即在疑问词和主语之间加do/does等助动词。
如 What time do you get up? 本句疑问词what time在句子作时间状语，所以倒装。
以上情况是简单句时的规律。复合句还有更繁琐的要求。不知道你的学习程度，如需追问，愿意继续帮助你。

要加，第二个对
举例：How many people there are? there are 代表的就是陈述语气；
How long have you been there?
How often did you do this?

这些词作为疑问词引导特殊疑问句时用疑问句语序
你举的例子：What time do you get up?How many people are there in the classroom?
当这些词,作为连词引导从句的时候,后面用陈述句语序.
比如：I want to know what time you got up.
How many people there are is not important.
当句子中存在情态动词,be动词或者助动词时,疑问句可以直接将这些动词提前.
比如：How long have you been in Shanghai?句中的have 是助动词,直接提前了.
如果句中只含有实意动词时,需要加助动词did/do,一般过去时用did,一般现在时用do或者does
比如：What time do you get up?
What time did you go home?
How often does he watch TV?
这3个句子分别对应了3种助动词,你参考下.

这些都是特殊疑问词 后面都加疑问语序 你问的是在从句中 这些词引导的从句都加陈述语序
你几点起床 what time do you get up
他问我几点起床 he asks me what time you get up