These verbs shorten when the future endings go on, and they all do it the same way: the final e of the "to" form turns into a d.
tener → tendré / tendría
So you end up with two syllables instead of three, which is simply more efficient.
Vendríamos más tarde, pero no tenemos tiempo · Lo pondré aquí · Lo pondría aquí · Lo pondremos aquí · ¿Saldrás esta noche?
Both sets are added to the "to" form, or here to the contracted base.
-é -emos -á -án -ás || would: -ía
The will endings are the versions of haber in the present, which is the connection that makes them stick. For would you need one key sound, and me gustaría is the hook.
Despite being a -go verb, traer keeps its full form in the futures.
Traeré · Atraeré · Distraeré
You have already seen these two misbehave, giving hecho and dicho after haber, and haz as a command. The futures are irregular in their own way.
Identify one form and the rest follows, since the whole of will and would use that same base.
Haremos · Haríamos · Harán · Lo haríamos, pero estamos ocupados ahora · Te diré más tarde
With future context you can drop the future tense entirely: te digo más tarde.
Worth separating carefully, because they sound so close. Poder is not a -go verb: it simply lost its e, from years of "podería" wearing down.
Podríamos (we could) against pondríamos (we would put)
None of this obliges you to use the future tense. With esta noche in the sentence, the plain present does the job.
¿Saldrás esta noche? · ¿Sales esta noche?