06-28
Thetownisthreemilesaway.镇子距此地三英里远。Shewashiredthreeyearsago.她是三年前录用的.。Theyhavethreegrown-upsons.他们有三个成年的儿子。Theriotsragedforthreedays.暴乱持续了三天。Hecanspeakthreelanguag...
06-28
作情态动词need作情态动词无人称或数的变化,后接动词原形,多用于否定句和疑问句中。由need引出的.一般疑问句,肯定回答常用must或haveto;否定答语常用needn't.由must引出的一般疑问句,肯定回答用must,否定答语用needn...