future tense
1、一般将来时
simple future
I'll have dinner with Ruby tomorrow.
我明天会和Ruby一起吃晚饭。
2、将来进行时
future continuous
I'll be having dinner with Ruby at 7pm tomrrow.
我明天下午7点的时候正跟Ruby一起吃晚饭呢。
3、将来完成时
future perfect
I'll have had dinner with Ruby when you finish work tomorrow.
你明天下班的时候，我已经和Ruby一起吃完晚饭了。
4、将来完成进行时
future perfect continuous
I'll have been having dinner with Ruby for 30 minutes when you finish work tomorrow.
你明天下班的时候，我已经和Ruby吃了半个小时晚饭了。