miserable (adj) 痛苦的
He speak miserable.
{Miserable} is an adjective which can’t be used to modify a verb.
{He} is the third singular, so please add an -s at the end of {speak}.
He speaks miserably.

He eat miserable.
The same problems mentioned above.
He eats miserably.

He drink miserable.
The same problems mentioned above.
He drinks miserably.

titchy (adj) 很小的
I have a titchy car.