主句是句子主体,能单独使用或出现句子，是包含有成分句的句子。
(1) 名词子句作介词（preposition）的受词同作动词受词一样，如果 主句 （ main clause ）是过去式时，作介词受词的从属子句也要变成相应的过去时态。
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无主句 Non-Subject Sentence ; subjectless sentence
主题句 topic sentence ; Thesis statement
标题主句 Main headline
绝对无主句子 absolutely subjectless sentence
主句用一般将来时 if
结论主句 Apodosis
主语言语句 [计] host language statement
写主题句 Writing the Topic Sentence ; Writing Topic Sentences
主要子句 main clause ; a principal clause
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在They often go to Italy because they love the food这个句子里，They often go to Italy是主句，because they love the food是从句。
In the sentence 'They often go to Italy because they love the food', 'They often go to Italy' is the main clause and 'because they love the food' is a subordinate clause.
楼下有人要见你。 （原句中的主句部分there is a man翻译成“有人”，然后将定语从句译成句子的谓语部分。）
一个句子可能包含一个主句以及一个或多个从句。
A sentence can consist of a major clause and one or more subordinate clauses.
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