一個好的句子中，每個等立成分都要以相同的形式出現(xiàn)。這種句法加強了文字的功力，使文章產生更大的效益。

如果同一句中應該等立的成分不對應，不但效益不好，而且也是一種句法上的缺陷。

下面兩則廣告中的第二個動詞形態(tài)就和前面的不對應，因此屬于一種字形上的錯誤：

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.

在第一句里的“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, ……”

第二句里的“and”是銜接前面的動名詞“interviewing and shortlisting”和后面的動名詞“assisting”。顯然，這里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(jù)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，還是多多注意，盡量避免好。

同樣的，下列 5 個從學生作業(yè)中找出來的句子，也犯了同樣的毛?。?/p>

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句子里的動詞形態(tài)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.