CORRECT THIS SENTENCE ; I PREFER EATING FRIED FISH THAN EATING RICE.

I'll be glad to check your correction.

PREFER IS PREFERED

No. The present tense is ok.

What word can replace THAN ?

MORE THAN

No.

http://www.englishforums.com/English/PreferToThan/vvcvr/post.htm

http://www.italki.com/question/90867#

Study those sites.

To correct the sentence, make the following changes:

"I PREFER EATING FRIED FISH THAN EATING RICE."

Correction: "I PREFER EATING FRIED FISH TO EATING RICE."

Explanation: To express a preference between two things, we typically use "to" instead of "than." So, in this case, we should replace "than" with "to." The corrected sentence will read, "I prefer eating fried fish to eating rice," which means you like eating fried fish more than you like eating rice.