The first tense I'm learning in Welsh is the present tense. When I started learning Welsh I held the opinion that it was a difficult language full of complicated constructs that I'd struggle to learn compared to French, Spanish or German.
Turns out I was wrong. Forming the present tense in modern colloquial Welsh (literary Welsh is quite different) is probably the easiest of any language I've learnt. The reason is thus: all simple present tense sentences involve conjugation of the same verb, "bod" (to be) followed by your action verb in its infinitive form (called a verb-noun, in Welsh).
So, where in French you'd need to know the first person singular and plural, second person singular and plural, and third person singular and plural forms of every verb you want to use, in Welsh you need only know the various conjugations of bod and the infinitive form of the other verb.
"I am swimming" is "Dw i'n nofio", where "dw" is the form of bod and nofio is to swim.
"He is swimming" is "Mae e'n nofio". "She is swimming" is "Mae hi'n nofio".
"I am eating" is "Dw i'n bwyta". "He is eating" is "Mae e'n bwyta".
And I really love this about Welsh. Forming a whole range of new sentences only involves learning one form of each new verb. It's so wonderfully consistent, and it lets you feel you're making progress almost instantly.