學好英語的語法是相當重要的。下面是我收集整理的 八年級 英語語法知識以供大家學習。
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八年級英語語法知識(壹)
動詞形態不對應
下面兩則 廣告 中的第二個動詞形態就和前面的不對應，因此屬於壹種字形上的錯誤：
① If you intend to buy or sell your property or having any queries, please feel free to call me .
② You will be in charge of interviewing and shortlisting candidates and to assist in the recruitment of 500 staff.
在第壹句裏的?having?應改為?have?才對。不然，就要把這個分句完全寫出來：
? or if you have any queries, ?
第二句裏的?and?是銜接前面的動名詞?interviewing and shortlisting?和後面的動名詞?assisting?。顯然，這裏不用動名詞而用不定式動詞?to assist?，也是犯了動詞形式不對應的錯誤，非改正不可。
還有，根據字詞的排列，?shortlisting?要排在? interviewing?前面，才合邏輯。
①和②這類的錯誤相當普遍。雖然這樣的錯誤不會影響人們對 文章 的理解，但是總不是件文字上的好事，還是多多註意，盡量避免好。
同樣的，下列5個從學生作業中找出來的 句子 ，也犯了同樣的毛病：
③ This will enable the parent to experience the new style of life and allows him or her enough time to consider settling down.
④ Utopianism violates the human conscience, denies privacy to individuals and discard human rights.
⑤ They have to reach a decision on either sending their child to a day-care centre or employ a maid.
⑥ It is very hard to relate the stories through other means and at the same time retains the critical aspects of the book.
⑦ This problem can be solved by developing correct language skills, concentrating on studies day by day, and try not to exert too much pressure.
③到⑦句子裏的動詞形態的錯誤是明顯的，改正也是容易的，即：
③ allow; ④ discards; ⑤ employing; ⑥ retain; ⑦ trying.
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八年級英語語法知識(二)
英語多義詞
由於壹詞多義在英語詞匯的運用上非常重要，這裏不厭其煩地再舉壹個家喻戶曉的常用字 break，以加強我對這點的重視。
作為動詞，break 有下列 12 個常用意思：
① 打破、斷，如：(a)If you drop the cup, you will break it. (b)The rope suddenly broke.
② 違反、違約，如：(a)Don't break the law. (b)Tom is notorious for breaking promises.
③ 傷、毀，如：(a)Tony broke Jane's heart by not marrying her. (b)Judy dropped her watch and broke it.
④ 中斷、打斷，如：(a)The barking of the dog broke our sleep. (b)The stranger rushed in and broke our conversation.
⑤ 破曉，如：They arrived at the airport just as the day was breaking.
⑥ 放棄，如：It is hard to break the habit of smoking.
⑦ 開路，如：We sometimes saw voluntary workers help break paths in villages.
⑧ 毫無得失，如：He bought the sewing machine at $700 and sold it at the same price. He broke even on the deal.
⑨ 闖入，如：A thief broke into my neigbour's house and ran away with some valuables.
⑩ 爆發，如：If a new world war breaks out, can you imagine the consequences?
11. 突破，如：The soldiers tried to break through the enemy's line.
12. 停止，如：The meeting suddenly broke up.
當名詞時，break 有 5 個常見義，如下：
① 裂口：Please send for a plumber to repair the break in the water pipe.
② 拂曉：Fish mongers start work at the break of the day.
③ 吃茶點時間：A few of us have a tea-break at 11am every day.
④ 休息：There is one-hour break for lunch.
⑤ 變動：The bankrupt man has a break in his way of living.
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八年級英語語法知識(三)
動詞主語別忘了呼應
根據英語語法規律，形容詞分句(也叫定語從句，adjective clause)裏的動詞必須和主句裏的先行詞(antecedent)呼應。先行詞是單數，形容詞分句中的動詞便是單數;先行詞是復數，形容詞分句中的動詞便是復數。例如：
① Do you know the woman who is walking the dog?(陪狗散步)
② Those who have performed well in the tournament will be rewarded.
在①裏，先行詞the woman是單數，形容詞分句裏的動詞is也是單數。反之，②裏的先行詞those是復數，who後面的動詞也是復數have.
根據這原則，who is upgrading 中的is便要改為are了。
動詞與主語不呼應的錯誤比比皆是。除了上述例子外，常見的錯誤還有下面幾種類型：
③Has Mr and Mrs Li decided to emigrate?
④Do your uncle live in Malaysia?
⑤There is several beautiful paintings on the wall.
⑥The news of Henry's resignation were received with great surprise.
⑦What we are doing are good for the nation as a whole.
⑧Someone have forgotten to turn off the light.
在③裏，助動詞 has 和復數主語 Mr and Mrs Li 不符，要改為 have.第④句裏的 do 和 your uncle 不搭配，要改為 does.第⑤ 句裏的 is 和真正主語 paintings 的數不壹致，應改為 are.這個句子也可改變為：?Several beautiful paintings are on the wall?。在⑥裏的主語 news，其形式是復數，但意思是單數，動詞也要單數的 was received 才行。⑦裏的主語是名詞分句(noun clause)，是個單數的單位，動詞也要單數的 is，不是 are.在⑧ 裏的主語 someone 是單數代名詞，隨後的動詞必須是 has forgotten 才對。
上述動詞和主語不壹致的毛病，屢見不鮮;即使英語能力好的人，也難幸免。
下面這句英語很好，但是裏面的動詞對嗎?是 has 還是 have 呢?
?Its unique concept and impressive magnitude has made it the talking point of the region.?
既然這句的主語是由 concept 和 magnitude 組成，便是復數，謂語動詞當然也要復數 have 才是。