①His invalid father is becoming a burden on/to him.

　　②Nowadays students are burdened (burden) with heavy homework.

　　③He took a part­time job in summer holiday to burden himself with his school fees.

　　完成句子

　　④There will be many challenges ahead, but I have confidence that I'll take_on/bear_the_burden.

　　尽管前面会有很多挑战，但我有信心勇挑重担。

　　　[系统归纳]

　　(1)a burden on/to ...　　　 是......的负担

　　bear (take on)/carry/reduce/share the burden 承受/担负/减少/分担重担

　　(2)burden sb./oneself with sth. 装载......；使......负担......

　　be burdened with ... 负重；为......所累

　　　[重点强化]

　　易错处处防

　　⑤This phenomenon will impose heavy burden with the family.with→on/to

　　佳句时时写

　　⑥He was burdened with endless paperwork, so he didn't have time to accompany his family.(过去分词作状语)

　　→Burdened_with_endless_paperwork,_he_didn't_have_time_to_accompany_his_family.

　　2．undertake vt.着手做，从事，承担；允诺，答应

　　　[自主体验]

　　单句语法填空

　　①The team will undertake for this experiment which is important to the whole country's security.

　　②He undertook to_improve (improve) the working conditions and the workers were expecting it.

　　句型转换/完成句子

　　③Tony undertook that he would never make fun of his deskmate again.

　　→Tony undertook never to make fun of his deskmate again.

　　④We are supposed to undertake_the_responsibility to lead a low­carbon life, which is of great significance.

我们应该承担过低碳生活的责任，这意义重大。