That would be very nice.里的would在句子是什么意思?

That would be very nice.里的would在句子是什么意思? That would be very nice .的would能用will吗? THAT WOULD BE VERY NICE BE动词词是什么? 请问 That would be nice.在什么语境下使用? That would be very helpful. 英语翻译That would be very nice.What about having a picnic with That would be very interesting.would可不可以换成will That would _____ very nice.A.am B.is that must would be nice有语法错误吗, THAT WOULD BE GREAT里面的WOULD是什么意思?什么语法啊 That would be that would be great