（3）across prep. 穿过；横穿 例：
14. cost 意为“值”“花费”,通常以物作主语，即：某物花（某人）多少钱。如：
That house cost him 3000 000. 那所房子花了他30万。
It costs them 10 000 a year to run a car. 使用一部小汽车每年花他们一万。
15. I feel like part of the group now. 我感觉像这个群体的一部分了。 feel like.“感觉像…” 后面跟名词或动名词。如： I feel like flying. 我感觉像在飞。 She feels like dreaming. 她感觉像在做梦。 四，语法知识
1. 反意疑问句由两部分组成，前面是陈述句，后面是简短问句。如果前面是肯定句，后面一般是否定问句，如果前面是否定句，则后面多是肯定句。 2. 反意疑问句使用中应注意：
除There be句型外，疑问部分的主语必须是与陈述部分的主语在人称数性方面保持一致的人称代词。
There be句型的疑问部分的主语用there.
There is going to be a class meeting on Friday afternoon, isn't there? 当陈述部分的主语是everyone, someone, anyone, no one等不定代词时，其疑问部分的主语可用he, 也可用they. Everyone knows his job, doesn't he?
如果陈述部分的谓语动词带有助动词或情态动词，疑问部分则使用相同的
助词或情态动词。
You can swim, can't you?
如果陈述部分的谓语动词是系动词Be,则疑问部分也用系动词。 Beijing is a beautiful city, isn't it?
如果陈述部分的谓语动词既不是系动词Be,也不带助动词或情态动词时，疑问部分要用do.
Your father likes playing basketball, doesn't he?
Will you? Won't you? Would you? Can you? Can't you? Could you? 用于祈使句后的疑问部分。用Won't表示“邀请，”will, would, can, 和 can't 表示“请求”.否定的祈使句后只能用will you. Try the new dress on, will you?
注：祈使句Let's…后，用shall we,let us…后用will you. Let's go home, shall we?
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