我也要买一本书。

Wǒ yě yào mǎi yì běn shū.

I will also buy a book.

我也买了这件衣服。

Wǒ yě mǎile zhè jiàn yīfu.

I also bought this piece of clothing.

我也不知道怎么办。

Wǒ yě bù zhīdào zěnme bàn.

I also don't know what to do (about the problem).