擦亮眼睛 辨別清楚

1. 他問我是否有電子詞典。

【誤】He asked me if I have electricity dictionary."

【析】（1）在賓語從句中，當(dāng)主句是一般過去時(shí)的時(shí)候，從句也要用相應(yīng)的過去時(shí)態(tài)，所以要把have改成had。

（2）電子詞典不是electricity dictionary而是electronic dictionary." electricity是不可數(shù)名詞“電”，而electronic是形容詞“電子的”。

（3）單數(shù)的可數(shù)名詞前須加冠詞，此處electronic dictionary前應(yīng)加an.

【正】He asked me if I had an electronic dictionary."

2. 初中時(shí)，他經(jīng)常在語法方面幫助我。

【誤】He often helps me in grammars when we were in junior high school.

【析】（1）時(shí)間狀語為when we were in junior high school，所以主句謂語動(dòng)詞應(yīng)該用過去式helped而非helps，即便有頻率副詞often。

（2）幫助某人做某事的句型是help sb." with sth. 而不是help sb." in sth. 所以要把原句中的in改為with。

（3）grammar為不可數(shù)名詞，不能變復(fù)數(shù)。此外，注意不要誤寫成grammer.

【正】He often helped me with grammar when we were in junior high school.