初中英语法大全:一般现在时一般现在时 其结构按正常语序,即“主语+谓语+其它”,有时为了起强调作用,时间状语也可提前. 其句式变化可分为两种情况 1)表示动作, 一般人称作主语的,变否定句须在动词前加助动词dont;变一般疑问句须在句首加助动词do。 E.g. They have lunch at 12:00. They dont have lunch at 12:00. Do they have lunch at 12:00? 2)单三人称做主语的,变否定句须在动词前加助动词doesnt;变一般疑问句须在句首加助动词does。 E.g. Jenny speaks English very well. Jenny doesnt speak English very well. Does Jenny speak English very well? 含有be动词的要在be上做变化. E.g. Danny is a good student. Danny isnt a good student