时态\语态 主动 被动 一般式 doing being done 完成式 having done having been done 否定形式： not +不定式， not + 动名词， not + 现在分词 All things having been canceled because of the snowstorm, many passengers could do nothing but take the train.如果弄懂了上面...
having to是错的，应当是have to 例如：I don't have to change gears.我没必要换挡。没有be having to的说法。have to只有一般现在时和一般过去时的用法，即have(has to)和had to 如：She had to stay in hospital last week,because she hurt her leg on her bike.上个星期她不得不呆在...
三种非谓语动词没有时态和语态， 但是有一些不同的形式：不定式：一般式：to do 进行式：to be doing (表示正在进行)完成式：to have done (表示发生在谓语动词之前，即：表示过去)完成进行时：to have been doing (表示过去开始并延续至谓语动词的时间)被动式：to be done (表示被动) 完成被动...
having been done 是现在分词或动名词的 完成形式的 被动形式,being done是现在分词或动名词的一般形式 的被动形式,这两个都不是 谓语时态 而是非谓语形式 前者表示 动作 发生在 谓语 动作之前 且被动 如 having bee... APP内打开 结果2 举报 是现在完成时的被动语态的动名词和一般现在时的被动语态的动名词,...
时态\语态 主动 被动 一般式 doing being done完成式 having done having been done 否定形式:not +不定式,not + 动名词,not + 现在分词All things having been canceled because of the snowstorm,many passengers could do nothing but take the train.如果弄懂了上面的 表格,你的非谓语动词就算掌握90%了,...
完成式 having done having been done 3）分词 时态\语态 主动 被动 一般式 doing being done 完成式 having done having been done 否定形式： not +不定式， not + 动名词， not + 现在分词 All things having been canceled because of the snowstorm, many passengers could do nothing but ...