There are some major flaws in what you just posted...
Edra- is indeed the verb stem for 'to open', however the present tense has more than one form and is as follows...
Edron = I open
Edrog = You open (informal)
Edrodh = You open (Doriathrin)
Edrol = Thee opens
Edrol = Opening (adjective, present participle)
Edrad = Gerund
Edra = He/she/it opens
Edrar = they open
Na- is the stem of 'to be' however all parts of the verb other than the imperative are reconstructed. The word 'na' is the preposition 'to'.
Due to the way pronouns in Sindarin work, 'it is' is realised by Te = It is.
-ant only forms the 3rd person singular past tense.
'It will open' is actually edratha.
The auxiliary doesn't exist in that form at all.
Noro lim means 'ride swift' not 'on'.
Xandarien Elanessa, Híril of Pupils of the Istari on Evernight