the young must look after the old 我想知道为什么要用thethe young must look after the old 我想知道为什么要用the young a young不行吗 the teacher said that Jack was a new student 这里为什么用the teacher a teacher 为什么不

来源：学生作业帮助网编辑：作业帮时间：2024/05/06 13:21:22

the young must look after the old 我想知道为什么要用thethe young must look after the old 我想知道为什么要用the young a young不行吗 the teacher said that Jack was a new student 这里为什么用the teacher a teacher 为什么不
the young must look after the old 我想知道为什么要用the
the young must look after the old 我想知道为什么要用the young a young不行吗
the teacher said that Jack was a new student
这里为什么用the teacher a teacher 为什么不行
如何区分the a

the young must look after the old 我想知道为什么要用thethe young must look after the old 我想知道为什么要用the young a young不行吗 the teacher said that Jack was a new student 这里为什么用the teacher a teacher 为什么不
简单意义上你可以这么理the表示特指,a表示泛指.
返回你的例句上：
1.the young must look after the old
在这里,the young特指年轻人,这类人,the old特指老年人,这类人,如果用a young就表现不出作者的原意了.他是想说年轻一族得照顾好老年人,他不是说一个年轻人得照顾好一个老年人.所以得用特指.
2.the teacher said that Jack was a new student
这里一样,the teacher也是特指,指的就是说jack是个好学生的那个老师.如果用a teacher,就是说一个老师表扬Jack是个好学生,那么大家就会问到底是哪个老师表扬的啊.所以这里也得用特指.

the 有一个用法是加一些名词表示一类人,如the old ,the young , the rich , the poor

the加形容词代表一类人，句子意思是年轻人要照顾老人。而a后面须跟名词。

the加上形容词表示一类人

()young must look after ()olda.the,a b.the,the c.a,a d.a ,the the young must look after the old 我想知道为什么要用thethe young must look after the old 我想知道为什么要用the young a young不行吗 the teacher said that Jack was a new student 这里为什么用the teacher a teacher 为什么不 you must look after well young children 连词组据 look well young you must after children连词成句 Jim,you must look()your brother.He’s young we must draw our attention （）the fact that the young don't look up （）the old nowadays选的是to to为什么把这些句子改成被动的~`We must tie the young tree to the stick.May i look after the baby at home. must look after the young children well.（同义句）we are now.（对划线部分提问）横线划在 doing our homework 1..We must look after young trees well.2.You can't use a dictionary in the exam.改被动语态! We must teach young children to cross the road safely the young man must be m______ to drive so fast Every young adult must realize the i_______ of playing sport We must take care of the young children.(改为同义句）We must ----- ----- the young children. Look,the young man is d__ some r__ now look the young pioneers are singing and dancing ___ Look,the young man is d__ some r__ the singer and the dancer look 还是look s so young They must look at this picture .(祈使句） .I should watch TV in the morning.（变特殊疑问句）He always takes good care of young children.(同义句）