You use here when you are referring to the place where you are.
I'm here all by myself and I know I'm going to get lost.
我独自一人在这儿,我知道我会迷路的。
Well, I can't stand here chatting all day.
唉,我不能一整天都站在这里闲聊。
You use here when you are pointing towards a place that is near you, in order to draw someone else's attention to it.
if you will just sign here.
如果你愿意就在这里签字。
You use here in order to indicate that the person or thing that you are talking about is near you or is being held by you.
My friend here writes for radio.
我身边这位朋友为电台撰稿。
If you say that you are here to do something, that is your role or function.
I'm here to help you.
我是来帮你的。
You use here in order to draw attention to something or someone who has just arrived in the place where you are, or to draw attention to the place you have just arrived at.
'Here's the taxi,' she said politely.
“出租车来了,”她礼貌地说。
You use here to refer to a particular point or stage of a situation or subject that you have come to or that you are dealing with.
It's here that we come up against the difference of approach.
正是在这一点上我们产生了方法上的分歧。
You use here to refer to a period of time, a situation, or an event that is present or happening now.
Economic recovery is here.
经济开始复苏了。
You use here at the beginning of a sentence in order to draw attention to something or to introduce something.
Now here's what I want you to do.
听着,这就是我想让你做的事。
You use here when you are offering or giving something to someone.
Here's your coffee, just the way you like it.
给,这是你的咖啡,按你口味调的。
Here are some letters I want you to sign.
这里有几封信需要你签字。
here we are
You say 'Here we are' when you have just found something that you have been looking for.
I rummaged through the drawers and came up with Amanda's folder. 'Here we are.'
我翻遍了抽屉,终于发现了阿曼达的活页夹。“找到了。”
here goes
You say 'Here goes' when you are about to do or say something difficult or unpleasant.
Dr Culver nervously muttered 'Here goes', and gave the little girl an injection.
卡尔弗医生紧张地嘀咕了一句“要打了啊”,接着就给那小女孩打了一针。
here's to something
You use expressions such as 'Here's to us' and 'Here's to your new job' before drinking a toast in order to wish someone success or happiness.
He raised his glass. 'Here's to neighbours.'
他举起酒杯说:“为邻居们干杯!”
here we go again
You use expressions such as 'Here we go' and 'Here we go again' in order to indicate that something is happening again in the way that you expected, especially something unpleasant.
'Police! Open up!'—'Oh well,' I thought, 'here we go.'
“警察!开门!” “噢,天哪,”我想,“又来了。”
here and now
You use here and now to emphasize that something is happening at the present time, rather than in the future or past, or that you would like it to happen at the present time.
I'm a practising GP trying to help people here and now.
我是一名执业家庭医生,尽力地切实地帮助他人。
here and there
If something happens here and there, it happens in several different places.
I do a bit of teaching here and there.
我到处零零碎碎地教一些课。