for that前一定要加逗号吗?

for that前一定要加逗号吗? that引导的从句前可以加逗号吗? 外语中 哪些连接词前一定要加逗号 it is known to us用在句首时一定要跟that吗?加逗号行不行? 是such as前加逗号,而for example 相反吗 for（意思为 因为 时）的用法是什么它处于句中时,前面一定要加逗号吗 现在分词作状语时一定要加逗号吗? next 在句中的用法是否一定要加逗号?是单独，且在句子前呀 等等前是否加逗号 状语从句in which前可以加逗号吗? He had overslept,so that he was late for work.I went to the lecture early so that I got a good seat.为什么一个SO THAT前加了逗号一个却没加啊/? 看下,thanks!1.compact：smaller than is usual for things of the same kind.than什么词性?is前省了什么?is去掉可以吗?为什么?Nine people were injured,including two kids.including前一定要加逗号吗?为什么?2.transient：staying i for连接两句句子,需要加逗号吗 形容词前一定要加系动词吗? 序数词前一定要加the吗? 乐器名词前一定要加定冠词吗 乐器名词前一定要加定冠词吗 useful前一定要加be动词吗