The types of adverbials are as follows:

1. Time adverbials: indicate the time when an action occurs, and are often located at the beginning or end of a sentence. For example, now, yesterday, tomorrow, etc.

2. Adverbial of place: indicates the place where the action occurs, usually at the beginning of the sentence. For example, in the classroom, in the library, etc.

3. Adverbials of manner: express the way of action, usually located in the middle of the sentence. For example, walk slowly, sing happily, etc.

4. Adverbial phrase of purpose: It expresses the purpose of the action and is usually located at the beginning of the sentence. For example, to exercise, to improve English level, etc.

5. Conditional adverbial: expresses the conditions for the action to occur, usually located at the beginning of the sentence. For example, if it rains, wait until someone comes.

Adverbial is an important modifying component of a sentence and another additional component in the predicate. Modify and limit the predicate center word from the aspects of situation, time, place, way, condition, object, affirmation, negation, scope and degree.

Adverbials have different functions in different languages. Chinese adverbials are the associated components in front of verbs or adjectives. They are used to modify and limit verbs or adjectives to express the state, method, time, place or degree of an action. etc.; English adverbials modify verbs, adjectives, adverbs or the entire sentence; German adverbials modify verbs, adjectives, adverbs or the entire sentence.

The importance of adverbials:

1. Supplementary information: Adverbials can provide more background information about the time, place, and method of action, making the sentence more complete and specific.

2. Enhance contextual understanding: Adverbials can enhance the sense of context of a sentence and help readers or listeners better understand the situation and background of the action.

3. Modify actions: Adverbials can be used to modify the predicate center word to make the description of the action more vivid and vivid.

4. Clear logic: By using adverbials, you can express the logical relationship between actions more clearly and make the sentence more organized.

5. Tone emphasis: The use of certain adverbials, such as unexpectedly, suddenly, etc., can enhance the tone of the sentence and play an emphasis role.