1000个基本英语单词
https://en.wiktionary.org/wiki/Appendix:1000_basic_English_words
https://simple.wikipedia.org/wiki/Wikipedia:List_of_1000_basic_words
1000 most common words in English | EF | Global Site
3000个基本英语单词
3000 most common words in English | EF | Global Site
两个字母的英语单词
https://en.wiktionary.org/wiki/Category:English_two-letter_words
多个字母的英语单词及缩写
https://en.wiktionary.org/wiki/Category:English_character_counts
从属连词：(subordinating conjunctions)
https://en.wiktionary.org/wiki/Category:English_subordinating_conjunctions
可以对比两个英语单词的含义：
其他Wordlist：
Word Lists in Oxford Learner's Dictionaries | OxfordLearnersDictionaries.com
The Corncob list of more than 58 000 English words
可下载Wordlist：