強調結構
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強調結構（emphatic structure）是一種句子結構。在句子中，為了突出某些成分以加強語氣，增強情感色彩或加強對比，就需要用強調結構。
do/does/did+原形動詞表強調
這種結構用來強調謂語動詞，往往只用於一般現在時或一般過去時的肯定句或肯定結構的祈使句。這種結構不適用於"be"動詞。
例如：
She does know the place well.
The children do hope to go to college.
She did come yesterday.
Do come and visit us!
Do shut up!
Do be careful!
It is/was ... that(who)結構表強調(分裂句)
這種結構通常用來強調主語。例如：
It was I who killed the beast.
What sb/sth ... is/was ...結構表強調(分裂句)
這種結構往往用來強調動作。例如：
What he wants to do is (to) leave her.