than的用法

John drives more carefully than his father.
John drives more carefully than does his father.
着两种表达都可以吗？在这两句中than的性质有变吗？还是说都是连词？

第一句有问题吧，y应该是John drives more carefully than his father drives,

作连词用1.用于形容词、副词的比较级之后，比... 例句：Jane is taller than me Jane比我高 2.用于 anywhere,different,else,other,otherwise 等之后,翻译成 除...之外 例句：I have nothing to tell you than my dream.除了告诉你我的理想，我没什么要告诉你 3.would rather do than do宁愿做...不愿做 4.no sooner ...than固定句型，一...就

一、more/ less/ adj+er than 注：此分析未包括as/like （一） 主语比较 1.1 than前若有宾语，则其后的助词需补出，时态要据后定。主语相同可省 （1）. the pay of senior executives increased in 1990 by a larger percentage than did the wages of other salaried workers. （2）. as a result of the continuing decline in the birth rate, fewer people will enter the labor force in the 1980’s than did in the 1960’s and 1970’s, a twenty-year period during which people born after the war swelled the ranks of workers. (主语people相同且无定语成分则省之，但did不能省) （3）. several studies have found that the coronary patients who exercise most actively are at least fifty percent less likely than those who are sedentary to die of a heart attack.（主语相同且有定语成分，必须要that/those来指代） 1.2 than前只有be + adj，则其后的主语无须补助词。 （1). even though bela bartok’s music has proved less popular than igor stravinsky’s and less influential than arnold schonberg’s, it is no less important. (2). in 1982 the median income for married-couple families with a wage-earning wife was $9,000 more than that for families in which only the husband was employed. 1.3 than前有两个动词，比较主语无须补助词。 (1). a study commissioned by the department of agriculture showed that if calves exercise and associate with other calves, they have require less medication and gain weight more quickly than those raised in confinement. （二） than后名词前的介词要补出 （1）. aging is a property of all animals that reach a fixed size at maturity, and the variations in life spans among different species are far greater than those among individuals of the same species: a fruit fly is ancient at 40 days, a mouse at 3 years, a horse at 30, a man at 100, and some tortoises at 150. 介宾的比较。 （2）. the investor who is uncertain about the future is more likely to put money into blue-chip stocks or treasury bills than into gold. （3）. nowhere in prakta is the influence of modern european architecture more apparent than in its government buildings.（倒装句） （4）. the human growth hormone, made by the pituitary gland, is secreted in higher concentrations during sleep than during waking hours. （三） 宾语比较，一般加that/those （1）. in addition to having more protein than wheat does, rice has protein of higher quality than that in wheat, with more of the amino acids essential to the human diet. (b-p106-19) （四） 宾语补语，比较结构修饰宾语，无须补出助词； （1）. in his eagerness to find a city worthy of priam, the german archaeologist schliemann cut through troy and uncovered a civilization a thousand years more ancient than the city known to homer’s heroes. （2）. .domestic automobile manufacturers have invested millions of dollars in research to develop cars even more gasoline-efficient than those at present on the road. （3）. the man was always aware, sometimes proudly and sometimes resentfully, that he was a small-town midwesterner thrust into a world dominated by wealthier, better-educated, and more polished people than he. （4）. bihar is india’s state, with an annual percapita income of $

如以上回答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息，可以点下面链接进行举报！

点此我要举报以上问答信息