by sb sth 和 buy sth for sb 意思一样吗?用法一样吗?

by sb sth 和 buy sth for sb 意思一样吗?用法一样吗? buy sth. by sb.怎么翻译? buy sth 什么 sb? buy sth for sb. bring sth for/to sb等于bring sb sth buy sb sth等于buy sth for sb 我知道但是bring sb sth 和 buy sbbring sth for/to sb等于bring sb sth buy sb sth等于buy sth for sb 我知道但是想问一下：bring sb sth 和 buy sb sth 等于bring sb w buy sb sth=buy sth for buy的用法buy sth.to sb.和 buy sth.for sb.的区别是什么? by sth for sb. by sth for sb buy sb sth 等于buy sth__ sb buy sth for sb 还是 buy sth to sb buy sth.to sb.=buy sb.sth还是 buy sth.for sb.=buy sb.sth好的+++++分 buy.sb.sth音标给出. 造句：buy sth for sb from sb by sth.to sb.还是by sth.for sb. sb.和 sth. sb.和 sth. buy sb.sth.中假如sth是代词时,是不是只能说：buy sth for sb.