芯是酸的
do，doing ，干，做paly，playing 玩write，writting，写 swim，swimming 游泳read，reading 读书study，studying学习go ,going,走drink,drinking,喝have,having,有give,giving,给say,saying,说 come,coming,来 tasted,tasting,品尝eat ,eating,吃play,playing,玩sing,singing,唱歌 learnt,learning,学习 dance,dancing，跳舞 wash,washing,洗see ,seeing,看见
蚊防四宝
write的ing形式：去掉结尾不发音的e，加上ing即可writing。write，英语单词，主要用作动词，作及物动词时意思是“写，书写；写信给；著述”，作不及物动词时意思是“写，写字；写作，作曲；写信”。
例句：
His writing brings him$ 10000 a year. 写作每年为他赚1万元。
Only later did she discover a talent for writing. 她后来才发现自己的写作天分。
I've never been a great one for writing letters. 我向来不喜欢写信。
