How do you spell watch为什么How后面要用do?做简单分析.最好是一句话概括.

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How do you spell watch为什么How后面要用do?做简单分析.最好是一句话概括.
How do you spell watch为什么How后面要用do?
做简单分析.最好是一句话概括.

How do you spell watch为什么How后面要用do?做简单分析.最好是一句话概括.
英语中的问句一个重要标志是倒装,即：把be（可变形为am、is、are、was、were）动词或情态动词（如：can、may、must、should等）置于主语前,如：He is a doctor.（他是医生.）→Is he a doctor?（他是医生吗?）She is at home.（她在家里.）→Where is she?（她在哪儿?）.如果既无be动词有无情态动词,则需用助动词do置于主语前来构成问句,如：They exercise three times a week.（他们一周锻炼3次.）→How often do they exercise?（他们一周锻炼几次?）本句中的do即同此理.

这是一个一般疑问句，跟What do you do?一样一样的.

do是simple present tense
问永远是真的东西，所以用do

疑问句要用助动词

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