1、作實義動詞，也叫形為動詞。和普通的動詞一樣，有自己的實際意思，表示「做」
例如：do 、homework,do exercises等。
當主語是i/we/you/they或者複數名詞時，動詞用do
擴展資料。
例如：i often do my homework in the evening
當主語是he/she/it或者其他單數名詞時，動詞用does
例如：
she often does homework in the evening
2.作助動詞，無實際意思。通常用於疑問句和否定句。
(1)用於一般疑問句。直接在句首加上do/does，注意大小寫和部分人稱及動詞的變化。
例如：
i like apples
do you like apples
yes,i do. /no,i don't
當主語是三人稱單數時，用does
例如：she likes apples
does she like apples
yes,she does. /no,she doesn't
(2)用於否定句時，在句子中加上don't或者doesn't
例如：i don't like apples
she doesn't like apples
例如：do 、homework,do exercises等。
當主語是i/we/you/they或者複數名詞時，動詞用do
擴展資料。
例如：i often do my homework in the evening
當主語是he/she/it或者其他單數名詞時，動詞用does
例如：
she often does homework in the evening
2.作助動詞，無實際意思。通常用於疑問句和否定句。
(1)用於一般疑問句。直接在句首加上do/does，注意大小寫和部分人稱及動詞的變化。
例如：
i like apples
do you like apples
yes,i do. /no,i don't
當主語是三人稱單數時，用does
例如：she likes apples
does she like apples
yes,she does. /no,she doesn't
(2)用於否定句時，在句子中加上don't或者doesn't
例如：i don't like apples
she doesn't like apples