现在正是吃晚饭的时候。

Xiànzài zhèng shì chī wǎnfàn de shíhou.

Now is exactly the time for dinner.

这正是我想问的问题。

Zhè zhèng shì wǒ xiǎng wèn de wèntí.

This is exactly the question I wanted to ask.

他现在的工作，正是他大学时想做的。

Tā xiànzài de gōngzuò, zhèng shì tā dàxué shí xiǎng zuò de.

His current job is exactly what he wanted to do in college.