we are now ing和we are ing 区别

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we are now ing和we are ing 区别

没什么大的区别,
见例子
We are now having our lunch.我们现在正在吃午饭
We are having our lunch.我们正在吃午饭
be doing sth 本身就表示:正在做某事.

没区别,有now 或无now 都表示现在正在。如:
She is singing。
She is now singing。
She is singing now。
都是“她现在正在唱歌。”