Bonjour !
1- I see you
Je te vois. (informal you)
Je vous vois. (formal & plural you)
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2- He sees us
Il nous voit.
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3- We see them.
Nous les voyons.
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4- She sees them.
Elle les voit.
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5- She sees you all.
Elle vous voit tous.
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6- I invite you
Je t'invite (informal you)
Je vous invite (formal or plural you)
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7- I invite him.
Je l'invite.
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8- He invites us.
Il nous invite.
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I'm French, so I'm 100% this is correct ; just for n°1 & 6; I don't know if you must use the informal you (2nd person singular) or the formal or plural you (2nd person plural).....
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Hope this helps☺☺☺