您好！
For me ,to understand his words is difficult(改为同义句）
=（It's）（difficult）for me（to）（underdtand）his words.
对于我来说要明白他说的话是很困难的。
您好！
is difficult for me to understand his words.
真心地希望我的回答能帮助你
It's difficult for me to inderstand his words
It's difficult to understand
(It's) (diffcult) for me (to) (understand) his words.
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