1、意思不同used to do解釋成“過去常常做某事”，後面接動詞原形。例：I used to play basketball.我過去常常打籃球。am/is/are used to doing解釋成“現在習慣做某事”。例：I am used to playing basketball.我習慣打籃球。
2、用法不同was/were used to doing解釋成“過去習慣做某事”。例：I was used to playing basketball.我過去習慣打籃球。be used to do解釋成“被使用去做某事”。used to do sth.過去常常做某事,(意思現在不做了)。be used to doing sth / be used to sth .是指習慣於做某事.(這裡的to 是介詞.)擴充套件資料：動詞不定式形式：1、 現在式：一般現在時表示的動詞，有時與謂語動詞表示的動作同時發生，有時發生在謂語動詞的動作之後。一般為：動詞+ to do somethingHe seems to know this.I hope to see you again. = I hope that I"ll see you again. 我希望再見到你。2、完成式：表示的動作發生在謂語動詞表示的動作之前。I"m sorry to have given you so much trouble.He seems to have caught a cold.
3、進行式：表示動作正在進行，與謂語動詞表示的動作同時發生。He seems to be eating something.
4、完成進行式：She is known to have been wreaking on the problem for many years.一般在表示情緒的動詞後加to do也表將來
1、意思不同used to do解釋成“過去常常做某事”，後面接動詞原形。例：I used to play basketball.我過去常常打籃球。am/is/are used to doing解釋成“現在習慣做某事”。例：I am used to playing basketball.我習慣打籃球。
2、用法不同was/were used to doing解釋成“過去習慣做某事”。例：I was used to playing basketball.我過去習慣打籃球。be used to do解釋成“被使用去做某事”。used to do sth.過去常常做某事,(意思現在不做了)。be used to doing sth / be used to sth .是指習慣於做某事.(這裡的to 是介詞.)擴充套件資料：動詞不定式形式：1、 現在式：一般現在時表示的動詞，有時與謂語動詞表示的動作同時發生，有時發生在謂語動詞的動作之後。一般為：動詞+ to do somethingHe seems to know this.I hope to see you again. = I hope that I"ll see you again. 我希望再見到你。2、完成式：表示的動作發生在謂語動詞表示的動作之前。I"m sorry to have given you so much trouble.He seems to have caught a cold.
3、進行式：表示動作正在進行，與謂語動詞表示的動作同時發生。He seems to be eating something.
4、完成進行式：She is known to have been wreaking on the problem for many years.一般在表示情緒的動詞後加to do也表將來