意思不同。
is的意思为:是; 当do做实义动词时(三人称单数用does),意思为:做、干。
读音不同。
is的英式读法是[ɪz;美式读法是[ɪz]。do的英式读法是[du:];美式读法是[du]。
根据不同的用法,do可以化身为五种不同形态,分别是do,does,did,doing和done。
1. do用于一般现在时
例句:I often do my homework in the evening.
2. does用于第三人称单数的一般现在时
例句:He does his lessons every day.
3. did用于一般过去时
例句:They did homework yesterday.
4. doing常用于现在进行时或者非谓语动词(暂时不提)
例句:He is doing his homework now.
5. done 常用于完成时,被动态或者非谓语动词(暂时不提)