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1、祈使句+and+陈述句1、promise sb. to do sth.=allow/permit sb. to do sth.=允许/答应某人做某分析：二者的汉语意思一样。但用法有区别，请看例子：My father promised me to give up smoking. 我爸爸答应我戒烟。（是“爸爸”戒烟，而不是“我”戒烟。即：动词不定式是主语发出的动作）My father doesnt permit/allow me to smoke. 我爸爸不允许我抽烟。在此结构中，动词不定式是宾语发出的动作。另外，两者的结构区别如下： promise to do sth.（后跟不定式）allow
2、/permit doing sth.（后跟动名词）例：I promised to help him with his English.Drinking wine is not allowed /permitted in our school.2、provide vt.提供；供给provide n. for provide n. withThe government provided food and houses for those who were homeless.政府给无家可归的人提供食宿。The school provides the students with textbooks.或
3、：The school provides textbooks for the students.学校为学生提供课本。3、祈使句+and+陈述句1）这种结构可以替换成“条件句+陈述句”。如：Work hard,and youll be successful in time./If you work hard,you will be successful in time.只要你努力，一定会成功。注意：祈使句后and可替换成then.2）祈使句+or+否定陈述句=否定条件句+否定陈述句。如：Get ready or you wont pass the test./ If you dont get ready,you wont pass the test.做好准备，要不你小测验不会及格的。注意：祈使句后的or可替换成otherwise.
