这些词在美国口语里是很经常用的 (英国口语不太清楚),这些词就是'to' 的合成形式:
gonna == going to
I'm gonna leave now == I'm going to leave now.我现在要走了.
wanta == want to
I wanta buy a car.== I want to buy a car.
gotta == got to
I gotta pass this test == I got to pass this test.我必须要通过这门考试.
oughta == ought to
You oughta know better.== You ought to know better.
如果你把带'to'的句子念得很快的话,你会发现自然就变成了 "-a' 的音.