我wǒ只zhǐ是shì想xiǎng帮bāng你nǐ。

I just want to help you.

这zhè只zhǐ是shì个gè玩wán笑xiào，别bié当dāng真zhēn。

This is just a joke, do not take it seriously.

他tā只zhǐ是shì有yǒu点diǎn累lèi，没méi什shén么me大dà问wèn题tí。

He is just a bit tired, nothing major.

我wǒ只zhǐ是shì想xiǎng帮bāng忙máng。

I just wanted to help.

他tā只zhǐ是shì一yí个gè孩hái子zi。

He is only a child.