(1) In English， the equivalents of these three words are “be aware of”“know” and “understand” respectively.

(2) These three words in language teaching can be explained from the perspective of language teaching objectives. When a teacher designs a lesson plan, he or she always has to take the teaching objectives into consideration and they should set the teaching objectives according to the ability or level of students and the difficulty of the language teaching materials, thus there three levels of the objectives: be aware of specific points; know specific points and understand specific points.

(3) In terms of the level of being aware of something, taking a English word of some proper nouns for example, the students are only required to know what these words are about and don't have to know how to spell it or use it In terms of the level of knowing, it means that the students are able to know the general meaning of the word but not to the level of using it. While the level of understanding means that the students are capable of knowing the meaning of the word as well as the usage of the word.

(4) Thus it can be concluded that these three words demonstrate the different levels of the teaching objectives in lesson plan or the teachers' expectation about specific students in language learning.