Your help has been very valuable.help为什么不加s

Your help has been very valuable.help为什么不加s Your help has been very valuable.看着象完成时`为什么没动词呢`` Thank you for your advice,it's been very ___ (help). thank you for your help.help能不能加s 英语语法问题 I suggest that everyong help in some way.help为什么不加-s, Thanks for your help.for后为啥用your help?为啥help不加ing? 英语句子改错 your advice has been of great valuable He must try to help his sister with her math?为什么try不加s It is very kind of you to help me的help前为什么要加to 英语选择题hank you for all your help.You’ve been very kind.______ Without your help,I can't work out the problem He has been a 同义句型转换,每空一词 1.Go and help your mother.She has been washing a