I'm writing to my aunt.

我正在给我姑姑写信。

I am writing to ask if Class 3 can have a party.

我写信询问三班是否可以举办派对。

I want to call you but my phone isn't working, so I'm writing to you.

我想给你打电话，但手机坏了，所以写信给你。

I am writing to express my outrage that animals were performing at the circus in West Park.

我写信是为了表达我对动物在西公园马戏团表演的愤怒。

I am writing to inform you that the oil wells in Back Bay are still polluting our rivers and killing the fish.

我写信是为了通知您，后湾的油井仍在污染我们的河流并杀死鱼类。

In a formal letter, when you know the name of the person you are writing to, you would sign off ‘Yours sincerely'.

在正式信件中，当你知道收信人的名字时，你会以“此致敬礼”结尾。

Commas are important in writing to clarify meaning.

逗号在写作中很重要，可以澄清意思。

Avoid repetition in your writing to keep it engaging.

避免在写作中重复，以保持其吸引力。

It's important to punctuate your writing to make it clear.

给你的写作加标点符号是很重要的，这样可以使其更清晰。

Avoid wordiness in your writing to keep the reader engaged.

避免写作中的冗长以保持读者的兴趣。