这zhè是shì我wǒ的de朋péng友yǒu李lǐ明míng。

This is my friend Li Ming.

这zhè是shì什shén么me？

What is this?

这zhè是shì我wǒ们men第dì一yī次cì见jiàn面miàn。

This is our first time meeting.

这zhè是shì新xīn买mǎi的de手shǒu机jī。

This is the newly bought phone.

这zhè是shì一yí个gè秘mì密mì。

This is a secret.