第三部分 ：简单句的补充(限定词/形容词/介词短语)
一、限定词/形容词/介词短语
Girls play games.
Girls are playing games.
Lovely girls are playing games happily.
Thousands of Lovely girls are playing games very happily.
After class thousands of Lovely girls are playing games very happily on the playground.
常见介词prep. :
in on at / from to / into onto / with without / of / by / for / about
其他介词 :before after / since until / during / between among / across through / against / like as
