大學英語語法之主語
1、主語：
(1)由名詞、代詞(人稱代詞用主格)、動詞不定式、動名詞等充當,說明動作是“誰”發出的，主語是句子陳述的對象，說明是誰或什么，表示句子說的是“什么人”，或”什么事“，如“我寫字”中的“我”，做出寫字這個動作。“寫”則是謂語，“字”是賓語，是接受謂語“寫”這個動作的對象，因此是賓語。如：The painter painted a very nice picture. (畫家畫了一幅漂亮的畫。) / They fought against SARS bravely. (他們勇敢地與非典搏斗。) / To see is to believe. (耳聽為虛眼見為實). / Helping animals is to help people. (幫助動物就是幫助人類。)
(2)動詞不定式或動名詞做主語時可用it代替,而不定式或動名詞移至表語或賓語之后。如：It is very comfortable to have a Class A seat during the long journey. (在長途旅行中能有個甲等座位簡直太舒服了。) / Eating too much is bad for your health.(=It is bad for your health eating too much.) (吃得太多對你的身體不利。)(比較好看，避免頭重腳輕)
(3)口語中常見主語或“主--系”省略：(It is) nothing. ((那)沒有什么。)/ (It) doesn’t matter. ((那)沒有關系。) / (I) thank you. ((我)謝謝你。)
(4)反意問句的附加問句,主語必須是代詞：The man looks worried, doesn’t he? (這個人看上去很著急不是嗎?) / Tigers are dangerous animals, aren’t they? (老虎是危險的動物不是嗎?)
(5)祈使句一般省略主語。加主語時往往用來指定某個人。Keep the keyboards clean, children. (孩子們請保持鍵盤的清潔。) (省略了主語) / You go there and fetch me a glass of water. (你去給我弄一杯水來。)
(6)主語一般在句首,但在問句中會處于第二位和句尾;倒裝句及there be句型主語在動詞之后。如：Computers are made in this factory. (計算機生產于這家工廠。) / Where are they? (他們在哪兒?) / Does the boy like staying home? (這個男孩喜歡呆在家里嗎?)
(7)主語與謂語必須保持單、復數的一致, 而謂語與表語或賓語之間沒有這一要求。Neither Jim nor Rose has passed the exam. (Jim和Rose都沒有通過考試。) / The Chinese people are a hardworking and brave people. (中華民族是一個勤勞勇敢的民族。)
(8)主語可以由從句充當
1、主語：
(1)由名詞、代詞(人稱代詞用主格)、動詞不定式、動名詞等充當,說明動作是“誰”發出的，主語是句子陳述的對象，說明是誰或什么，表示句子說的是“什么人”，或”什么事“，如“我寫字”中的“我”，做出寫字這個動作。“寫”則是謂語，“字”是賓語，是接受謂語“寫”這個動作的對象，因此是賓語。如：The painter painted a very nice picture. (畫家畫了一幅漂亮的畫。) / They fought against SARS bravely. (他們勇敢地與非典搏斗。) / To see is to believe. (耳聽為虛眼見為實). / Helping animals is to help people. (幫助動物就是幫助人類。)
(2)動詞不定式或動名詞做主語時可用it代替,而不定式或動名詞移至表語或賓語之后。如：It is very comfortable to have a Class A seat during the long journey. (在長途旅行中能有個甲等座位簡直太舒服了。) / Eating too much is bad for your health.(=It is bad for your health eating too much.) (吃得太多對你的身體不利。)(比較好看，避免頭重腳輕)
(3)口語中常見主語或“主--系”省略：(It is) nothing. ((那)沒有什么。)/ (It) doesn’t matter. ((那)沒有關系。) / (I) thank you. ((我)謝謝你。)
(4)反意問句的附加問句,主語必須是代詞：The man looks worried, doesn’t he? (這個人看上去很著急不是嗎?) / Tigers are dangerous animals, aren’t they? (老虎是危險的動物不是嗎?)
(5)祈使句一般省略主語。加主語時往往用來指定某個人。Keep the keyboards clean, children. (孩子們請保持鍵盤的清潔。) (省略了主語) / You go there and fetch me a glass of water. (你去給我弄一杯水來。)
(6)主語一般在句首,但在問句中會處于第二位和句尾;倒裝句及there be句型主語在動詞之后。如：Computers are made in this factory. (計算機生產于這家工廠。) / Where are they? (他們在哪兒?) / Does the boy like staying home? (這個男孩喜歡呆在家里嗎?)
(7)主語與謂語必須保持單、復數的一致, 而謂語與表語或賓語之間沒有這一要求。Neither Jim nor Rose has passed the exam. (Jim和Rose都沒有通過考試。) / The Chinese people are a hardworking and brave people. (中華民族是一個勤勞勇敢的民族。)
(8)主語可以由從句充當
