He needs get a part—time job to make a lot of money.是否正确

不对
needs to get
need既然有第三人称单数的变形,说明在本句中作实义动词,因此用法是：need to do 后面跟动词不定式
如果need的话,可以get,need也可以作情态动词,象can/may/must,后面直接跟动词原形,但情态动词need不能变作三单needs
因此有两种变化：
He needs to get rea part—time job to make a lot of money.（比较常用）
He need get a part—time job to make a lot of money.（少用,语法正确）