19．Try to speak English as much as possible．（改為否定句）
Don't try to speak English as much as  possible．

分析 --盡量多說英語．
--不要盡可能多地說英語．

解答 答案：Don't try．考查否定句．原句是祈使句，通常以動詞原形開頭，否定形式在句首加don't．后跟動詞原形try．答案是Don't try．

點評 考查祈使句．表示請求、命令等的句子叫祈使句．通常以動詞原形開頭，否定形式通常是在句首用don't，let's后+not等．要結合語境完成練習．

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