'stand'的进行形式是'standing'。

The continuous ___form of 'stand' is 'standing'.

'Hers'是'her'的所有格形式。

'Hers' is the possessive ___form of 'her'.

'Isn't'是'is not'的缩写形式。

'Isn't' is the short ___form of 'is not'.