圣诞出行需三思而后行

it might be a good idea to，做……是个好主意，实际上是表示建议，相当于you'd better，你最好……

2.Roads, railway lines and airports have been closed as blizzard conditions have swept across the UK, leaving people stuck in their homes or even their cars.

leaving+宾语，宾语补足语

在英语中有些及物动词，接了宾语意义仍不完整，还需要有一个其他的句子成分，来补充说明宾语的意义、状态等，称为宾语补足语，简称宾补。

比如说：

I heard Jean singing this morning.

句子中的Jean显然是宾语。但是主语I听到的并不是Jean，而是Jean singing。singing 是句子中的宾语补足语。它和宾语之间是逻辑上的主谓关系，也就是说从逻辑上来讲，是Jean执行了singing的动作。

句子中的singing是现在分词做宾语补足语。能够充当宾补的还有宾语补足语的大致有：不定式，现在分词，过去分词，形容词，副词，介宾短语等。一般情况下，宾补通常紧跟在宾语之后。

比如：

I find learning English difficult.(difficult是形容词做宾补）

I saw the kite up and down. （up and down是副词做宾补）

Tom made the girl cry. (cry是省略不定式符号to的动词不定式）

*常跟复合宾语的动词有：call,name,make,think,find,leave,keep,nominate(任命),choose,elect(选举),define(定义),regard, see, recognize,treat, take,consider, look up, refer to, accept, acknowledge,describe,depict(描述),represent(表现出),declare(宣称),denounce, employ(雇佣), use, show, organize, express

当感官动词和使役动词，如：

see hear notice watch hear feel observe(感官动词)

make have let(使役动词)

接宾补时，不定式的符号to必须省略。

在help后,不定式可以带to,也可不带。

3.Eurostar, the company that operates the service was forced to cancel all trains for three days after extreme weather in France caused trains to break down, leaving some passengers trapped under the English Channel for up to 16 hours.

break down损坏, 发生故障

例句：Our car broke down and we had to draw it to a garage.
      我们的车坏了, 不得不把它拖到修车厂去。

      Her telephone had broken down.
      她的电话故障了。

4.So with more bad weather forecast, if you are absolutely determined to come to the UK over the Christmas then you ought to wrap up warm, pack your snowshoes and even bring a sledge.

be determined to决心,决定

例句：We are determined to fulfill the task.
      我们决定完成这项任务。

      They are determined to smite the invaders hip and thigh.
      他们决心狠狠打击侵略者。

ought to应该

例句：We ought to send people to help on our own initiative.
      我们应主动派人去支援。

      He said such a thing ought not to be allowed to happen.
      他说这件事不应当允许发生。

wrap up掩饰,伪装,使全神贯注,围好围巾,包起来

例句：You'd better wrap yourself up well before you go out.
      你在外出前最好穿暖和些。