German is a inflectional language.

First, the characteristics of German vocabulary.

German words are classified into 13 categories according to grammatical functions: articles, nouns, pronouns, adjectives, numerals, verbs, conjunctions, prepositions, adverbs, modal particles, modal particles, exclamations and onomatopoeia. The first six categories have morphological changes and are called variable parts of speech; The last six categories have no morphological changes and are called invariant parts of speech.

The first letter of a noun in German must be capitalized. There are three genders of German nouns (masculine, feminine and neuter), and the genders of other words are often irregular except for the rules of gender comparison of nouns directly to people. German also has four cases (nominative, accusative and possessive) and two numbers (singular and plural). In use, apart from some changes of nouns themselves, the nature, number and case of nouns in sentences are mainly expressed by the changes of articles, pronouns, adjectives and some numerals before nouns. When learning a noun, remember its nature and remember it together with the article.

Verb inflections include person, number and time: including present tense (pr? Sens), past tense (Pr? Terium), future tense (Futur I), present perfect tense (Perfekt), past perfect tense (Plusquamperfekt) and future perfect tense (Futur II), voice (active voice, passive voice) and modality (direct expression, imperative mood, subjunctive mood). For example, the present tense is used to indicate what is happening now, the past past tense is used for indirect speech, and the first subjunctive form is used for indirect speech. German verbs can be divided into weak verbs, strong verbs and mixed verbs. When learning a verb, we must learn its inflected form.

Second, the characteristics of German sentence structure:

Verb predicate is the core of a sentence, which needs the object or preposition object of each case and various complements.

In ordinary declarative sentences, when the subject or other sentence components are at the beginning of the sentence, the predicate verb always takes the second place. If the predicate consists of two parts, namely, the changeable part (time auxiliary verb or modal auxiliary verb) and the immutable part (infinitive or verb second participle), the changeable part takes the second place (in some sentences, it takes the first place), and the immutable part takes the end of the sentence, which is a unique predicate "frame structure" in German.

Another feature of syntax is that the verb predicate is located at the end of the sentence, and the order of sentence components is: conjunction or relative pronoun-subject and other components of the sentence-verb predicate.

I hope it can help you solve the problem.