❖ 改为否定句时,一般直接在后面加not ❖ 改为一般疑问句时,直接将助动词提前
4. “助动词+动词的某种形式(原形、现在分词、过去 分词等)”构成谓语。如:
They will tell you a lot about China. 他们会告诉你许 多有关中国的情况。
She does like English.她的确喜欢英语。
谓语的语态
谓语分主动语态和被动语态。主动语态表 示谓语的动作或者状态是由主语发出的;被动 语态表示主语是谓语动作的承受者。
(1)一般现在时的被动语态:
e.g.All the students except Mary are allowed to watch TV at home. (2)一般过去时的被动语态:
e.g.The old man was often laughed at. (3)一般将来时的被动语态:
e.g.Heart disease will be reduced greatly because of this medicine.
(4)现在进行时和过去进行时的被动语态: e.g.The building is being built. The car was being repaired when l came in.
He remains unsatisfied.他依然不满意。
情态动词
❖ 常见的情态动词有can,may,could,might,should等,所 有情态动词后面都接动词原形且无人称和数的变化
❖ 分为四类: (1)只作情态动词:must,can(could),may(might),ought (2)还可作实义动词:need,dare (3)还可作助动词:shall,should,will,would (4)具有情态动词特征:have(has,had)to,used to