1、定语是修饰名词或代词的成分,不管这个名词在句中是作主语、表语、宾语,定语都是
可以修饰名词或代词的.
定语是个修饰成分,把它去掉句子仍然通顺,只是在句意上有出入
如 he is a good student .中good 为 定语,修饰名词 student,把good去掉,句子仍然通顺.
2、表语.主要用与主语+系动词+表语.这个结构,它是句子不可缺少的成分.
如 he is a student.中 a student 是表语,不能删除.
ps:作表语的词或短语有:
1、名词 he is a good student
2、形容词 he is good
3、介词词组 he is at home
4、少数副词 he is there
5、数词、3 and 4 is 7
6动名词和不定词: his jod is to take care of the boy
7、表语从句 the problem is whether he will come