Both 'Will' & 'Would' are modal auxiliaries and the peculiarities of modals are that they take the base form of the principal verbs in addition to modifying the meaning of the main verbs. They are markedly different in this respect from the primary auxiliaries.

An Adverb clause of condition introduced by 'If' creates the situation under which the action of the main verb will take place.

The examples cited above are about real events that always happens or '0' conditional. 'Would' followed by 'always' introduces a concept of universality.

The structure: IF+ PRESENT+PRESENT or
IF+PAST+PAST

In open conditions that hinge on probabilities the structure is : (IF clause in present),(main clause in'will/will+another modal/imperative). When 'if' presents unreal/hypothetical/tentative, we require a 'PAST-WOULD-MODAL(Mark it!).

"I would say thank you if you did it for for me"– is an example of this 'PAST-WOULD-MODAL"

In the other four examples, the meaning derived is as good as when-clause. It is no condition at all — a present-present structure. The 'modal-would' we use here makes the verb more polite, less pushy. The 'always' there is needed. It leaves the final imprint of conviction and cleans "WOULD" smacking of an unsavoury probability.

Both 'Will' & 'Would' are modal auxiliaries and the peculiarities of modals are that they take the base form of the principal verbs in addition to modifying the meaning of the main verbs. They are markedly different in this respect from the primary auxiliaries.

An Adverb clause of condition introduced by 'If' creates the situation under which the action of the main verb will take place.

The examples cited above are about real events that always happen or '0' conditional. 'Would' followed by 'always' introduces a concept of universality.

The structure: IF+ PRESENT+PRESENT or
IF+PAST+PAST

In open conditions that hinge on probabilities the structure is : (IF clause in present),(main clause in'will/will+another modal/imperative). When 'if' presents unreal/hypothetical/tentative, we require a 'PAST-WOULD-MODAL(Mark it!).

"I would say thank you if you did it for for me"– is an example of this 'PAST-WOULD-MODAL"

In the other four examples, the meaning derived is as good as when-clause. It is no condition at all — a present-present structure. The 'modal-would' we use here makes the verb more polite, less pushy. The 'always' there is needed. It leaves the final imprint of conviction and cleans "WOULD" smacking of an unsavoury probability.