一、比較對象不一致
在英語的比較句型中，兩個待比較的對象應(yīng)具有可比性，這也就是語法上說的比較對象的一致性問題。有的同學(xué)在進行英語寫作時，經(jīng)常忽略這個一致性問題，從而寫出一些不合英語習(xí)慣的句子。如：
誤：The population of China is much larger than Japan.
正：The population of China is much larger than that of Japan.
析：the population of China 應(yīng)與 the population of China比較，而不能與 Japan 比較，即誤句主要錯在比較對象不一致。注重，為避免重復(fù)，正句中的the population of China用that of China代替。
誤：The style of the new building is different from the old one.
正：The style of the new building is different from that of the old one.
正：The new building is different from the old one in style.
析：用different表示比較時，也要注重比較對象的一致性。就本題而言，新的 style 應(yīng)與舊的 style 比，或新的building與舊的 building 比，而不能將兩者混在一起。
二、主謂不一致
在英語中，句子的主語和謂語動詞在人稱和數(shù)上必須一致。由于受漢語的影響，許多同學(xué)在寫作時經(jīng)常忽略句子的主謂一致關(guān)系，從而造成錯誤。如：
誤：Anyone can borrow the books, and it cost nothing to borrow them.
正：Anyone can borrow the books and it costs nothing to borrow them.
析：第一個分句的時態(tài)是一般現(xiàn)在時，故第二個分句中的動詞cost不可能是動詞的過去式，且由于句子主語是it，故謂語動詞應(yīng)用一般現(xiàn)在時costs，而不能用過去式cost。
誤：He as well as his parents have been to the Great Wall.
正：He as well as his parents has been to the Great Wall.
析：當(dāng)作主語的名詞或代詞后有as well as, in addition to, including, with, along with, together with, but, except等引導(dǎo)的成分時，謂語動詞的單復(fù)數(shù)仍由其前的主語決定。再如：My English teacher together with his family is from England.
誤：Not only John but also I are going to Shanghai next week.
正：Not only John but also I am going to Shanghai next week.
析：在由not only…but also…, not just…but…, or, either…or…, neither…nor…連接主語的句子中及在there be句型中，謂語動詞的單復(fù)數(shù)按就近原則處理，即按與謂語動詞最靠近的那個主語來確定謂語動詞的單復(fù)數(shù)形式。如：Neither you nor she is a teacher.
三、單復(fù)數(shù)不一致
名詞有可數(shù)和不可數(shù)之分，而可數(shù)名詞又有單數(shù)與復(fù)數(shù)之區(qū)。在英語寫作中，名詞單復(fù)數(shù)問題也是許多同學(xué)經(jīng)常忽略的一個問題。如：
誤：On the way home I took a lot of picture because since the scenery was so beautiful. I’ll have them developed this afternoon.
正：On the way home I took a lot of pictures because the scenery was so beautiful. I’ll have them developed this afternoon.
析： take picture中的picture為可數(shù)名詞，根據(jù)下文中的them可知，此處應(yīng)用復(fù)數(shù)形式pictures。
誤：He has been working so hard recently that he has got good mark in all his subjects.
正：He has been working so hard recently that he has got good marks in all his subjects.
析：從后面的subjects來看，mark應(yīng)用復(fù)數(shù)形式，說的是在各科考試中都取得了好分?jǐn)?shù)。
四、非謂語形式不一致
動詞的非謂語形式一直是英語學(xué)習(xí)中的一個難點，而動詞非謂語形式的一致性問題更是許多同學(xué)經(jīng)常忽略的一個問題。如：
誤：To know what is good and doing what is right are two different things.
正：To know what is good and to do what is right are two different things.
析：由and 連接的兩部分為并列主語，前一部分用不定式結(jié)構(gòu)，后一部分也應(yīng)用相同的結(jié)構(gòu)。
誤：Fishing is his favourite hobby, and to collect coins is also his hobby.
正：Fishing is his favourite hobby, and collecting coins is also his hobby.
析：誤句的問題就在于句子不平行(不一致)，因為and前后都為句子，按英語習(xí)慣其結(jié)構(gòu)形式應(yīng)該一致。
五、代詞不一致
代詞一致的問題主要存在于性別一致、數(shù)的一致(單復(fù)數(shù)問題)和代詞的格等方面。如：
誤：There are forty students in our class, and thirty of them are boys.
正：There are forty students in our class, and thirty of us are boys.
析：從前一分句可看出，本句談?wù)摰氖恰拔覀儼唷钡那闆r，故后一分句也應(yīng)用第一人稱。
誤：Once one has money, we can do what he wants (to do)
正：Once one has money, he can do what he wants (to do)
析：誤句中前面提到的是one has money，面又有what he wants，we與前后代詞不一致，故應(yīng)改為he。
六、搭配不一致
搭配不一致主要指句中的固定搭配應(yīng)保持完整并與上下文一致。如：
誤：He worked so hard as he could catch up with his classmates.
正：He worked so hard that he could catch up with his classmates.
析：從固定形式上看，有so…as…,so …that… 等。但從句意上看，此處應(yīng)該用so…that…，才能保持句意及結(jié)構(gòu)的一致。
誤：I was so tired that I fell asleep at the moment my head touched the pillow.
正：I was so tired that I fell asleep the moment my head touched the pillow.
析：此處the moment是名詞用作連詞，表示“一……就……”，其前不能加at。
七、邏輯主語不一致
按英語習(xí)慣，當(dāng)非謂語動詞作狀語時，其邏輯主語應(yīng)與句子主語保持一致，否則便會造成錯誤。如：
誤：After reading the letter, tears ran down his cheeks.
正：After he read the letter, tears ran down his cheeks.
正：After reading the letter, he burst into tears.
析：after 引導(dǎo)動名詞作狀語時，要注重其邏輯主語與句子主語保 持一致。
誤：Given more time, the work could have been done better.
正：Given more time, we could have done the work better.
析：在上句中，given 是 give(給)的過去分詞，given more time為過去分詞短語，在句中用作狀語，表示條件，相當(dāng)于 If we had been given more time。按照英語語法，分詞短語用作狀語，它的邏輯主語必須與句子主語保持一致