在英语中，'-ness'是一个常见后缀，可以把形容词变成名词。

In English, '-ness' is a common ___suffix that turns adjectives into nouns.

我们可以在动词'read'后面加上后缀'-ing'来表示进行时。

We can ___add '-ing' to the verb 'read' to indicate the present continuous tense.