run fast 改为否定句Sam bought a pen yesterday改为否定句 The skirt costs me fifty yuan.改为一般疑问句 She comes from London改为一般疑问句快,一小时之内!

问题描述:

run fast 改为否定句
Sam bought a pen yesterday改为否定句 The skirt costs me fifty yuan.改为一般疑问句 She comes from London改为一般疑问句
快,一小时之内!

sam didnot buy a pen yesterday.
is this skirt costs you fifty yuan?
is she come from london?