I am really not entirely sure or confident on the matter regarding commas and the use of "too" -- I have been writing sentences like: "He, too, has seen the film." "He has seen the film, too." "I think so, too, but it's..." But is it the correct way of doing so? Or should I drop the commas? Thanks!
Commas are used when the phrase isn't essential. For example: I like to eat pies when I'm hungry. There is no comma after "pies" because the phrase "when I'm hungry" changes the meaning of "I like to eat pies": it now only applies when the speaker is hungry. If you removed the phrase, the sentence's message will be changed. I like to eat pies, even when hungry. There is a comma after "pies" because the statement "I like pies" already applies to all situations, so the phrase "even when hungry" is unneeded. You could remove the phrase and the sentence would mean the same thing. Similarly, in the sentences you posted, it's already confirmed that he's seen the film or thought the thought, and adding "too" doesn't change the meaning of it. The sentences you posted are correct. I hope this made sense.
"Too" usually plays the same role as saying "also" or "as well", in that it means something is already stated. It can also mean excess, like when you say "I had too much pie to eat."
Thanks for the replies, it's been something that I've been unsure of for a while -- appreciate the help clearing up the confusion!
This one is wrong, I'm pretty sure. I feel like the comma is unnecessary, but I doubt it's that big of deal if it's in there. As far as I know, the other two are right.
Nope, all of his sentences are correct, for the 'too' in the context at hand is simply the paranthetical use of the comma.
