原句：Lily does world puzzles every day.（莉莉每天都做世界拼图。）
改写成否定句：Lily doesn't do world puzzles every day.（莉莉不是每天都玩世界拼图。）
puzzle
英 [ˈpʌz(ə)l] 美 [ˈpʌz(ə)l]
v. 使困惑，使迷惑；（因迷惑而）苦思，冥思苦想；（通过苦苦思索）解决（或弄清楚），理出头绪（puzzle sth. out）
n. 测验智力（或知识）的游戏（或玩具，问题）；拼图游戏，拼图玩具；令人费解的人（或事物），难题
[ 复数 puzzles 第三人称单数 puzzles 现在分词 puzzling 过去式 puzzled 过去分词 puzzled ]
词组短语：
jigsaw puzzle 七巧板；智力拼图玩具
crossword puzzle 纵横字谜游戏
puzzle out 苦苦思索而弄清楚
puzzle over 努力思考；为…烦恼；苦苦思考
近义词：
vt. 使…困惑；使…为难；苦思而得出
baffle , discomfit
vi. 迷惑；冥思苦想
contemplate
n. 谜；难题；迷惑
enigma , difficult problem
双语例句：
We fitted together the pieces of the puzzle.
我们把拼图玩具的各部分拼合在了一起。
We invited readers who completed the puzzle to send in their solutions.
我们邀请解完谜的读者交出谜底。
The rise in accidents remains a puzzle.
事故的增多仍是个谜。
英语中陈述句改为否定句怎么改？
1、句中有be动词(am/is/are/was/were)的，在be动词后加not。
如：I can swim.——I can't swim.
He is a math teacher. → He is not a math teacher.
2、句中有情态动词的(can/should/must/would)，在情态动词后面加not;
如：There will be a new building next year. → There will not be a new building next year. (will not可以缩写为won’t)
3、句中没有be动词和情态动词的，在动词前加don’t或doesn’t
① 句中动词为原形的，加don’t .如： I like apples. I don’t like apples.
②句中动词为三单式的，加doesn’t，并将三单式的动词还原成原形。
如：He likes apples. He doesn’t like apples.
4、肯定句中的some在否定句中应改为any
如：There are some students in the classroom. There are not any students in the classroom.
特殊形式的否定句：
(1)肯定句含有every-的合成词时，变否定句时改为no-。
如：Everything is ready.→Nothing is ready.
(2)肯定句中含有always， usually和ever时，变否定句时改为never。
如：He is always late for school.→He is never late for school.
(3)肯定句含有many，much时，变否定句时分别改为few，little。
如：Many students know him.→Few students know him.
(4)肯定句中含有still时，变否定句时应改为no longer。
如：Tom is still in bed.→Tom is no longer in bed.
(5)肯定句含有both， both...and，all时，变否定句时应改为never，neither...nor，none。
如：Both of us are students.→Neither of us is a student.
(6)肯定句含有nearly， almost时，变否定句时应改为 hardly。
如：Lily nearly knows him .→Lily hardly knows him .
(7)肯定句含有“形容词+ enough”时，变为否定句时应改为“too +形容词的反义词”。
如：He is short enough to reachit.He is too tall to reach it.
否定句 ，Lily does not do world puzzles every day.
行为动词作为与一般现在时态主语是第三人称单数形式,变否定句直接在主语后加助动词doesn't，原来的动词要还原。
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你好，Lily likes doing word puzzles.改为一般疑问句 Does Lily like doing word puzzles?谢谢提问，望采纳！
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