For emphasis:
* " tellement " (so much/so very) - This is the most common way to express emphasis. For example, "Il est tellement beau" (He is so handsome).
* " vraiment " (really/truly) - This is a more neutral way to express emphasis. For example, "C'est vraiment intéressant" (It's really interesting).
* " très " (very) - This is a more general way to express emphasis. For example, "Elle est très intelligente" (She is very intelligent).
For agreement:
* " si " (so/yes) - This is used to agree with a statement. For example, "Tu es fatigué ? Si." (Are you tired? Yes).
* " oui " (yes) - This is another way to agree with a statement. For example, "Tu as faim ? Oui." (Are you hungry? Yes).
For comparison:
* " aussi " (also/as well) - This is used to compare two things. For example, "Elle est aussi grande que sa sœur" (She is as tall as her sister).
* " autant que " (as much as) - This is used to compare two things in terms of quantity. For example, "J'aime autant les chats que les chiens" (I like cats as much as dogs).
To clarify, please provide the specific context of how you want to use "are so," and I can give you a more precise French translation.