Do、re、mi、fa、sol、la、si的学名唱名：1 2 3 4 5 6 7 音名：c d e f g a b 唱作：do re mi fa so la si 叫做“基本音级”。 被广泛采用的音名,除了c d e f g a b之外,还有do re mi fa sol lasi。 这. Do their homework 做作业，do do their homework 确实有做作业，主语是 they ，故用 do 对do their homework中的do 进行强调：确实. Do和does的区别和用法区别是：do 是动词原形，用于第一人称、第三人称的复数 (i/you/we/they)。does 用于第三人称单数 (he/she/it) does 用于第三人称单数。do用于一般现.
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— socrates to do is to be. Statin side effects can be uncomfortable but are rarely dangerous. 有do就没to，没do就有to 当but前的谓语结构是do时，或者定语从句中有do时，but后面不用to there is nothing to do but stay here.
用 助动词 do 的场合：一般现在时的疑问句，否定句、一般过去时的疑问句，否定句，如： 1.一般现在时的否定式：he doesn't get up early everyday.
I have no choice but to stay here. Means, but what does d.o. The boys do do their homework after school every day. They were spoken by very famous philosophers.
What's different and what's alike between these two kinds of health care providers? To be is to do. The first two lines are contemplations on life and are supposed to be very profound. Help to do sth.：词性为动词短语，该短语中的help后面跟着不定式（to do），表示主动帮助他人完成某件事情。 help doing sth.：词性为动词短语，该短语中的help后面跟着动名词（doing），.
