he interest in playing computer games is now in decline

问题描述:

he interest in playing computer games is now in decline

第一,interest是名词,不能直接放在he的后面;第二,没有in decline 这个词组.
故应改成,His intrest in playing conputer games declines now.
不过这个句子很别扭,不如写成
He is not as interested in playing computer games as before