人教版四年級英語下冊《At the farm》Part A PPT下載(第1課時)，共15頁。
New words
potato
carrot
tomato
green beans
單詞精講
tomatoes, potatoes, carrots, green beans
tomatoes是tomato的名詞復(fù)數(shù)，即在tomato后面加es，類似的單詞還有potato → potatoes（土豆）。
名詞分為可數(shù)名詞和不可數(shù)名詞兩種。可數(shù)名詞通常能一個一個的數(shù)，所以有單數(shù)和復(fù)數(shù)兩種形式。不可數(shù)名詞，顧名思義，不能一個一個的數(shù)，所以沒有復(fù)數(shù)形式�？蓴�(shù)名詞單數(shù)變復(fù)數(shù)時，有一些是規(guī)則的，有規(guī)律可循；有一些是不規(guī)則的。
Homework
Compare(比較) you with your classmates and write an essay. Use the words and sentence we learnt today.
Tips: ① tomato、potato、carrot、green beans
② The potatoes are big.
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關(guān)鍵詞：At the farm PPT課件免費(fèi)下載，.PPT格式；
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