将以"heis"开头的句子改为疑问句时,需根据具体语境选择合适的be动词(am/is/are)并将其提前。以下是具体方法及示例:
一、基本规则
1. 若主语为第三人称单数(如he/she/it),be动词用"is";
2. 若主语为第一人称单数(如I)或复数(如we/they),be动词用"am"或"are"。
二、常见用法示例
现在时态
原句:He is reading a book.
疑问句:Is he reading a book?
过去时态
原句:He was at the party last night.
疑问句:Was he at the party last night?
完成时态
原句:He has finished his homework.
疑问句:Has he finished his homework?
三、注意事项
若句子为祈使句(如"He is going to the store."),改为疑问句需使用助动词"Did":
疑问句:Did he go to the store?
若句子为含有情态动词(如can, could)的陈述句,直接将情态动词提前:
原句:He can swim.
疑问句:Can he swim?
四、补充说明
若需强调动作发生的时间,可用特殊疑问词(如when, where)引导:
原句:He lives in New York.
疑问句:Where does he live?
通过以上方法,可根据具体语境灵活调整be动词和疑问词,构成符合语法规则的疑问句。