(8) 我问了她许多问题。
误：I asked her a good many of questions.
正：I asked her a good many questions.
析：与 a lot of, a great number of, a great deal of 等结构不同，a great many 后接名词时，习惯上不用介词 of，除非其后的名词带有限定词或是代词，如：a great many of the students（许多学生），a great many of them（他们当中的许多人）。
(9) 她用手掩面。
误：She covered over her face with her hands.
正：She covered her face with her hands.(www.hxen.com)
析：cover（覆盖，盖住）是及物动词，其后用介词 over是多余的。
(10) 你要想卖掉你的产品，你就得为此登广告。
误：If you want to sell your product you must advertise for it.
正：If you want to sell your product you must advertise it.
析：advertise for sth (sb) 意为“登广告征求或寻找某物或某人”（此时 advertise 是不及物动词）；若要表示“为……登广告”或“登广告宣传……”，advertise 是及物动词, 其后要直接跟被宣传的东西作宾语。比较：The manager wants to advertise for a new secretary. 经理想登广告招聘一位新秘书。