请问什么人称情况下。单词要加s 。什么叫第三人称单数。答:1)一般情况下在动词尾直接加-s;如:read→reads, write→writes, say→says;2)以s,sh,ch,x,o结尾的单词加-es;如:teach→teaches, wash→washes, guess→guesses,fix→fixes, go→goes;3)以辅音字母+y结尾的词,先变y为i,再加-es。如:try→tries, carry→carries.nobody是单数形式,...
请问一般现在时第三人称单数动词什么时候不加s答:1.情态动词,不能加,比如must,can,may,might,will,would,shall,should 注意:need, dare+动词原形,不能加S, 比如 He need study hard. He dare walk in the dark.need,dare+to do, 要加+S. He needs to study hard. He dares to walk in the dark.