介词

The abstract grammatical meaning and flexible usages of prepositions make it a difficult point in teaching Chinese as a second language.

介词由于其抽象的语法意义和灵活的用法而成为对外汉语教学中的一个难点。

The figure-ground segregation theory derives from psychology and is used by cognitive linguists to analyze the meaning of linguistic structures, that of prepositions in particular, and further to analyze the poetic images.

图形-背景分离理论源于心理学，后有认知语言学家用来研究语言结构的意义，尤其是介词的意义，进而用来研究诗歌意象。

They include the everyday household words, most parts of the body, as well as the numerous pronouns, prepositions, conjunctions, and auxiliary verbs that hold the language together.

它们包括日用品的话，大部分地区的机构，以及众多的代词，介词，连词，动词和辅助拥有共同的语言。

A noun phrase must have Case and Case is assigned by V or P to the object position, or by AUX to the subject position.

名词词组必须有格，宾语的格是由动词或介词决定，而主语的格由助动词决定。

Is under careful watch 是介词短语(=is carefully watching) 13.61 行: however it seems clear that the Cascade Range …; is capable of another performance at any time.

这里…it seems clear that 这是英语的一种句式， that 为连词引导的主语从句代替了 it 的具体内容…似乎是非常清楚的。

According to the old stories of Iceland and Norway, Eric the Red was forced to leave Iceland because he had committed a murder, for which he got into trouble.

介词+关系代词引导的非限制性定语从句根据冰岛和挪威的古老传说，埃里克。雷德是因为犯了谋杀罪，正因为此他陷入了麻烦，被迫离开冰岛。

As the trade winds lessen in 48 , the ocean temperatures rise, causing the Peru current flowing in from the east to warm up by as much as 5 °C.

在介词in的后面，当为名词无疑，注意要搞清楚，in有多种意义，此处整个短语来修饰lessen减少，当为在某个方面减少。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。