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1. to know/learn something by heart ¼Çס£»±³ËÐ
I can recite this poem without looking at it. I know it by heart.
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2. to know something like the back of one¡¯s back ÁËÈçÖ¸ÕÆ
He's lived in this city all his life. He knows it like the back of his hand.
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3. know something inside out Á˽⳹µ×
She spent twenty years studying the history of London. She knows it inside out.
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4. know next to nothing ¼¸ºõ²»Á˽⣻¼¸ºõÒ»ÎÞËùÖª
I'm really not interested in politics. I know next to nothing about it.
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5 .not have the faintest idea Ò»µã¶¼²»ÖªµÀ
'Which is the longest river in the world?' 'I haven't the faintest idea.'
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6. haven¡¯t got a clue Ò»µã²»ÖªµÀ
'Can you tell me where Portsmouth Road is?' 'Sorry, I haven't got a clue.
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