高级搜索的另一个好处就是可以在搜索结果中匹配不同单词形式，比如复数、不同的动词结尾和各种语法时态。
Advanced search has the added benefit of matching different word forms, such as plurals, alternate verb endings, and various grammatical tenses, in the search results.
在书写和翻译时必须注意句子的结构、一致关系、时态呼应、动词形式等等。
In writing or in doing translation, we must pay special attention to sentence construction, agreement, sequence of tenses, verb forms, etc.
Need的助动词形式主要用于现在时态的疑问句、否定句和条件句中。
The auxiliary forms of need are used primarily in present-tense questions, negations, and conditional clauses.
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