1:他深爱的祖母去年冬天去世了.
His grandmother whom he loves deeply passed away last winter.
2:在英语学习中,你最需要的就是多练习,因为这是学习英语的必由之路.
In the study of English,You need more pratice that is the only way of learning English .
3:你外出最好穿上保暖大衣以便抵御寒风.
If you go out,you'd better put on the coat which is used to keep warm to resist the cold wind.
4:只要不灰心,任何人都能找到克服困难的办法.
As long as don't lose heart ,anyone can find the method which overcomes the difficulties.
5:那是一个美好的日子,我们所有的人都感到非常愉快.
That's a day when we all enjoy ourselves .
自己很认真地翻译,应该不会错.
（好多人都没在用定语从句- -）
祝你快乐：）