Learn the pronunciation of the alphabet first, then learn the pronunciation of German (you can buy a book on German pronunciation on it), and master some daily expressions initially.
I think we should learn grammar first, especially the grammar about verb displacement, because it is easy to find words without understanding the law of verb displacement. After verbs, learn noun parts of speech and morphological changes, preposition usage (this should be combined with vocabulary), basic word order and basic tense (learn the present tense and present perfect tense first, then learn the general past tense). Learning the future tense), adjective suffix and subjunctive mood won't be a big problem. Then learn all kinds of clauses (the previous ones are mastered, and the clauses are not difficult to learn). When you encounter new words in the process of learning grammar, you can write them down and recite them. In other words, memorizing words is a gradual process. After learning the basic grammar, you can expand words on a large scale.
As an introduction to our major, the book "Contemporary College German" is taught in the following order: vocabulary (preview), grammar, text and morphology. Lexicology is more professional in the later stage, and amateur study can be skipped first.
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