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，當主句是一般過去時的時候，從句也要用相應的過去時態，所以要把have改成had。

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

（3）單數的可數名詞前須加冠詞，此處electronic dictionary前應加an.

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

2. 初中時，他經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）時間狀語為when we were in junior high school，所以主句謂語動詞應該用過去式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為不可數名詞，不能變復數。此外，注意不要誤寫成grammer.

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