do一般表示什麼

do詞性

do是用於一般現在時的助動詞，did則是用於一般過去時的'助動詞。done是do的過去分詞。do還有實義動詞（有實在意義的動詞）的解釋：做，幹，等。口語中，do 的否定式通常用縮寫形式。例如，do not 略作don't，did not 略作didn't。助動詞無法與be動詞、動詞原形一同使用。

do的用法

1. do用於一般現在時

例句:I often do my homework in the evening.

2. does用於第三人稱單數的一般現在時

例句:He does his lessons every day.

3. did用於一般過去時

例句:They did homework yesterday.

4. doing常用於現在進行時或者非謂語動詞(暫時不提)

例句:He is doing his homework now.

5. done 常用於完成時，被動態或者非謂語動詞(暫時不提)

例句:

He has done his homework.

He had done his homework before he went out.

His homework is done.

作爲助動詞，常用於疑問句和否定句。

1. 一般疑問句

例句:Do you like English?

2. 選擇疑問句

例句:Does he go to school by bus or by bike?

3. 特殊疑問句

例句:How do you go to school?

4. 反義疑問句

例句:You like English, don't you?

5. 否定句

例句:I don't like English.

另外，也可以用於表示強調, 此時需要重讀。

例句:He does need your help. (does重讀，強調確實需要幫助)

還有，也可以代替其他的動詞，使句子更簡練。

例句:

Who cleaned the windows?

Tom did.