请问,he Came at once 的came,he在前面要加s,还是Ing,一般he后加什么He后面是加什么

请问,he Came at once 的came,he在前面要加s,还是Ing,一般he后加什么He后面是加什么 he was up at once I recognized the man _ he came into the room.A.at once B.suddenly C.immediately D.quickly One day ,Jack went to a big dinner party.He was in old clothes,He came in (1)_______nobody at him and nobody gave him a seat at the table,so Jack went back home(2)他穿上最好的衣服,然后回到这个宴会.The host stood up at once and came t He was fired at once.at once怎么翻译? （ ）he came,he would bring us a lot of flowers.A Every times B At one time C Every time D Once 请问After he came to 请问After he came to I came here at least once a month.翻译 at once的同义词 at once 的意思 he always does his homework at once when he finishes school的同义句 at once的同义词是什么 at once 的同义词组 英语at once的解释 At once和at first的区别 Once a week he came to see me while l was in hospital.Once a week he came to see me while l was in hospital.Once a week did he come to see me while l was in hospital.这两句哪句是正确的? he ordered the work _started at once答案是be说是he ordered the work _started at once答案是be说是order后有that从句要用虚拟语气!请问be是虚拟语气! He stopped playing the piano at once.at （如果意思多的话,请举几个具有代表性的句子.）