They have four lessons in the morning变特殊疑问句？

They have four lessons in the morning. 变成特殊疑问句可以有以下几种：
Who have four lessons in the morning? 谁上午有四节课？
What do they have in the morning? 他们上午有什么？
How many lessons do they have in the morning?他们上午有几节课？
When do they have four lessons? 他们什么时候有四节课？

1、They have four lessons in the morning.这个英文句子含义是：他们上午有四节课。
2、在英语语法中，肯定句变为特殊疑问句，需要针对句中的lesson（课、课程）提问，而lesson是可数名词，所以使用疑问词how many（多少）。
3、因此，这个句子改为特殊疑问句是How many classes do they have in the morning？译为：他们上午有几节课？

They have four lessons in the morning.
一般现在时态陈述句，改为特殊疑问句，可以这么问：
How many lessons do they have in the morning?
或者： When do they have four lessons ?
...

这个句子就时间提问，
When do they have four lessons?
就fourlessons提问
How many lessons do they have in the morning?

How many lessons do they have in the mornig？他们早上几节课？
请参考

扩展阅读：they have fun ... to have 中文翻译 ... are they in grade four ... heaven 中文翻译 ... they have 中文翻译 ... have the flu 中文翻译 ... archer ... have you 中文翻译 ... there is no game ...