你能来帮忙是件好事。

Nǐ néng lái bāngmáng shì jiàn hǎoshì.

It’s a good thing that you can come to help.

帮别人也是一件好事。

Bāng biérén yě shì yí jiàn hǎo shì.

Helping others is also a good thing.

大家都说你做了一件大好事。

Dàjiā dōu shuō nǐ zuò le yí jiàn dàhǎoshì.

Everyone says you did a great good deed.