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at idea. so 和 such 的運用,一般 so 后用形容詞或副詞, such 后用含形容詞的名詞詞組,如上例可改成: This party is so great an idea. Today is so nice that I can go fishing.=Today is such a nice day that I can go fishing. 39。s been three years since we last saw our primary school since引導(dǎo)一個句子或時間點,相當(dāng)于 for 引導(dǎo)時間段,對應(yīng)的主句是相應(yīng)持續(xù)性動 詞的完成時態(tài)。非持續(xù)性動詞對應(yīng)的時間是時間點。如: I have had the pen for two years.=It39。s been two years since I bought the pen.=I bought the pen two years ago. They have been away for half an hour. =It39。s been h