Why do you add prepositions here and tomorrow in this English conversation? What is the difference between the preposition before tomorrow and here and the preposition without 2?

In this dialogue, prepositions are added to "tomorrow" and "here" because they need to be combined with other words to form a complete sentence and express the correct meaning. Specifically:

"What's the weather forecast for tomorrow?" In this sentence, "for" is a preposition, which is used to guide the noun "tomorrow", indicating the weather forecast at a certain time in the future (that is, tomorrow).

"It's freezing here." In this sentence, "in" is a preposition, which means that the place where the speaker is (that is, "here") is very cold.

Therefore, these two prepositions are necessary in this dialogue to indicate the time or place in the sentence and ensure the meaning of the sentence is clearer.

It should be noted that prepositions are very common words in English, which are used to express time, place, direction, reason, purpose and so on. In English, some verbs, adjectives or nouns need prepositions to express specific meanings, so it is very common and necessary to use prepositions in sentences. Sometimes, the choice of prepositions is also influenced by context. Different occasions or situations may need to use different prepositions to express the correct meaning. Therefore, learning and mastering the usage of English prepositions is an important aspect of learning English.

Besides common prepositions such as "for", "in", "on" and "at", there are some complicated prepositional phrases such as "according to" and "although".

","instead of.

Of ",etc., these prepositional phrases are often used in English and need to be mastered when learning English. When using prepositions, we need to pay attention to some special situations, for example, some verbs can express different meanings directly with objects or prepositions; Some prepositions have multiple meanings and need to be determined according to the context and so on. Therefore, learning and understanding the usage of prepositions in English is an important step to learn English well.