1. across from 意为"在......对面"

e.g. The bank is across from our school. 银行就在我们学校对面。

【拓展】 across 作介词，意为"从一边到另一边；横过"。

e.g. Can you swim across the river? 你能游过这条河吗？

2. in front of 意为"在......前面"（在某范围之外）

e.g. There is a car in front of the house. 在房子前一辆小汽车。

【辨析】in the front of "在......前面"（在某范围之内）

e.g. There is a table in the front of the classroom.在教室的前面有一张桌子。

3. next to 意为"紧靠着；紧挨着；贴近"

e.g. The little boy is next to his mother. 小男孩紧挨着他的母亲。

【辨析】next to与near的区别

从空间讲near 只表示"在......附近"；而next to有"紧挨着"之意；next to比near靠的更近。

如：Peter sits next to Mike. 彼特紧挨着迈克坐。

Peter sits near Tom. 彼特坐在汤姆附近。

4. How can I help you? 需要我帮忙吗？

表示向他人伸出援手，主动提出帮助的意思，此句还可说成：How can I help you? 或How may I help you?

类似的句子还有：

May I help you?

Do you need any help?

Is there anything I can help (you) with?

What can I do for you?

5.Thanks so much.真是太感谢了 No problem.这不算什么。（You are welcome. It's a\my pleasure. My pleasure. Not at all. Don't