sb1 help sb2 do sth 当sb1是第三人称是,do是不是用第三人称单数?

sb1 help sb2 do sth 当sb1是第三人称是,do是不是用第三人称单数? StringBuffer sb2=sb1;是什么意思那sb1==sb2与sb1=sb2有什么不同么? Help sb do sth. help sb.do sth.还是help sb.to do sth. help sb.(to)do sth. help sb do sth.但是 help do sth 还是 help to do sth? help to do Sth还是help doing Sth还是help do Sth help to do sth help doing sth 的用法 是help do sth还是help doing sth? how sb1 seem to sb2sb1 seem to sb2 是不是2觉得1怎么样 help sb do sth help sb doing sth help sb to do sth help sb with sth 四者有什么区别 help sb sth,help with sth,help sb do sth.造句 help sb with sth,help sb for doing sth和help sb do sth 的区别? help sb to do sth和help sb do help的短语help sb. to do sth.help sb. do sth.怎么用? help的词组help sb.do sth. 还是help sb. to do sth. help sb.do sth.可不可以说成 help sb.to do sth.please help me! help sb (to) do sth中的sb可以省略吗?也就是说有help to do ,help do help to do sth和help do sth