Learn Chinese Grammar: 坐起来(zuò qǐlai=to sit on) vs. 坐起来(zuò qǐlai=to sit up) vs. 坐起来(zuò qǐlai=start to sit)

坐起来(zuò qǐlai=to sit on) vs. 坐起来(zuò qǐlai=to sit up) vs. 坐起来(zuò qǐlai=start to sit):

Examples:

1. This sofa is very comfortable to sit on.

这(zhè)张(zhāng= a measure word for flat objects)沙发(shāfā=sofa)坐起来(zuò qǐlai=to sit on)很(hěn=very)舒服(shūfu=comfortable)。

坐起来 here means "your feeling when you're sitting on the sofa"

2. Can you sit up?

你(nǐ=you)可以(kě​yǐ=can)坐起来(zuò qǐlai=to sit up)吗(ma=question particle for "yes-no" questions)？

3. I started to sit tiredly. (I was tired then started to sit).

我(wǒ=I)累(lèi=tired)地(de)坐起来(zuò qǐlai=start to sit)了(le=(indicates "something has done"))。