Er

The pinyin er could possibly refer to a number of different words.

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二 (èr)

• Comparing "er" and "liang" (A1)
• Structure of numbers (A1)

而 (ér)

• Expressing "not only... but also" with "budan... erqie..." (B1)
• Using "er" to explain contrasting ideas (B2)
• Limiting scope with "jiu" (B2)
• Explaining purpose with "wei... er..." (C1)
• Expressing "however" with "ran'er" (C1)
• Expressing "thus" with "cong'er" (C1)
• Using "because" with "er" to indicate effect (C1)