1、“do + 实意动词” 构成一般现在时的疑问句和否定句,例如:
~Do you like it? (一般疑问句)
~What do you like?(特殊疑问句)
~I don't like it.(否定句)
2、is 是 be 的单数第三人称形式,也用于下列情况:
~系表结构,如 What is your name? (what 是表语)
~现在进行时,如 He is staying at home. 他正在家呆着。
~被动语态,如 He is brought up by his grandma. 他是(被)奶奶带大的。
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