Translation

Frankly, you not enough seriously do not regard your tasks seriously enough.
Actually, I very  really need your help.
I just only partially agree with you.
Tell us honestly, why did you behaved behave so stupidly?
He maked  made a good act, that is why he feet  felt good. (I'm not sure what this means.)
The cold has passed, and I felt feel good.
It rained yesterday, but it's snowing today.
It's almost time for lunch already. Let's stop beside at the nearest cafe.
He tries hard to succeed, but he hardly knows where to start.

Translation

Frankly, you're not regarding your task seriously enough.
Actually, I very much need your help!
I (only) partially agree with you.
Tell us honestly, why did you behaved so stupidly? (It might be nicer to say "why did you behave that way?")
He makes a good act, that is why he feels good. (I'm not sure what you're trying to say.)
The cold yesterday felt good. I'm glad the cold has passed. I feel better now that the cold has passed. (I'm not sure what you're trying to say. Here are some possibilities.)
It rained yesterday, but it's snowing today.
It's almost time for lunch already; let's stop at the nearest cafe.
He tries hard to succeed, but he hardly knows where to start.

Translation

Frankly, you are not serioulsly enough regarding your tasks.
Actually, I need your help very much.
I just partially agree with you.
Tell us honestly, why did you behave so stupidly.
He performed/did a good act, that is why he feels good.
Cold has passed, and I felt good.
It rained yesterday, but it's snowing today.
It's almost lunch time already. Let's stop next to the nearest cafe.
He tries hard to success, but he hardly knows where to start.