several 到底是修饰hundreds of 还是 hundred?我看了几本语法书,书上说,hundreds of 可以用户several ,some 等词修饰,但在百度网上的说法两者都有,望智者给我一个正确答案!

several 到底是修饰hundreds of 还是 hundred?我看了几本语法书,书上说,hundreds of 可以用户several ,some 等词修饰,但在百度网上的说法两者都有,望智者给我一个正确答案! several的用法到底several hundred books还是 several hundreds of the books several hundredseveral hundred several hundreds ofseveral hundred of这三个到底有什么不同?（我彻底搞混了） 有人说many ,several 后接hundred单数,有人说接hundreds of,到底接什么? several 的用法several与hundred,thousand,million在一起怎样使用啊,hundred,thousand,million 是用单数还是复数?如果hundred,thousand,million后有名词呢? several hundred 和several hundreds of有什么区别? several hundred,several hundreds,sebveral hundredsof 哪一个正确? several hundred 和several hundreds of有什么区别? live for several hundred years 等于什么 hundred后面可以加s吗例如：one hundred,那到底是“two hundred”,还是“two hundreds”呢? hundred, thousand, million等词前面与具体数字/several和不具体数字修饰时的不同情况.hundred, thousand, million等词前面有具体数字或several修饰时,不加-s,不与of 连接,如是many等不具体数字就加-s,与of 连 It's several hundred years old.(同义句替换) It __ __ several hundred years ago. several是不是等于a few和someseveral是修饰可数名词还是不可数名词? there are ___students in our school 1.several hundred2.several hundreds 3e.some hundred 4.several of hundred several hundred 中的hundred 后要加s several hundred 的形式是不是和a few hundred two hundred 的一样不需要加上s 123456789英文表示123456789 one billion twenty-three million four hundred fifty-six thousand seven hundred and eighty-nine 123456789 one hundred and twenty-three million,four hundred and fifty-six thousand,seven hundred and eighty-nine 到底是 several million要不要加S?several是具体数字吗?若用它来修饰数词,如million,要不要加S啊? several hundred后面的名词要加s吗