3、在句中出现了Look，Listen，Can't you see? 等暗示词时，说明后面谓语动词的动作正在发生，该动词应用现在进行时。◇Look! Maria and Tom are dancing under the tree.看！玛丽亚和汤姆正在树下跳舞。◇Listen! Our English teacher is singing the popular English song.听！我们英语老师正在唱那首流行的英文...
e.g.(例子)：She came to help us in those days． 否定形态 主语+didn't +谓语动词原形+其它 在行为动词前加didn't，同时还原行为动词 例句：I didn't know you liked coffee. 一般疑问句 ①Did+主语+谓语动词原形+其它 ②Was/Were+主语+表语 例句：Did you do homework? 特殊疑问句 ①特殊疑问词+...