Question

This is my new cap,改为否定句。

Answer 1

按照直接改法：This is not my new cap.
拓展：特殊形式的否定句，有以下几种：
（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．
（8）谓语动词是be，have（有）或谓语含有助动词、情态动词时，直接在这些词后加上否定词not。如：
She can swim．-She can't swim．
（9）谓语动词是行为动词时，要在该动词前加上do ／does ／did not，该词恢复原形。如：
He gets up early．-He doesn't get up early．
（10）既要否定谓语动词，又要变换句中的单词。如：
He can read and write．-He can't read or write．
（11）用含否定意义的词或词组取代肯定句中的某些词或词组。如：
I know both English and Chinese．-I know neither English nor Chinese．
类似的有：ever／always-never， somebody-nobody，something-nothing， everybody- no one，almost-hardly