高频单词电子词典精编版
Grammatical Notations
For each use of each word in this dictionary, there is grammar information underneath the entry. For a very few words, such as abbreviations, contractions and some words of foreign origin, no grammar is given, because the words do not belong to any word class, or are used so freely that every example could be given a different word class, e.g. AD, ditto, mpg, must\'ve.