七、频率副词

常见的频率副词有always, usually, often, sometimes, seldom, hardly, never等。

1. 频率副词在句中通常放在行为动词之前，系动词、情态动词或助动词之后。如:

I usually get up at six in the morning.

Li Ming is often late for school.

We could hardy understand him.

在简略答语和省略句中，则常放在系动词、情态动词或助动词之前。如：

Can they usually find time for amusements?

Yes, they always can.

为了加强语气,也可放在句首。其中often, seldom, hardly, barely, never在句首时，句子要倒装。如：

Sometimes we play basketball, sometimes we play table tennis.

Often did we warn them not to do so.

2. 其中seldom, hardly, 和never常看作否定词，因此在构成反意疑问句时，附加疑问句部分常用肯定式。如：

You seldom go to your uncle’s, do you?

She can hardly read and write, can she?

八、older和elder; farther和further

1. old的比较级和最高级有两种形式，即older, elder和oldest, eldest。在就年龄作比较时和修饰物时要用older, oldest。如：

I am one year older than you.

Mr. Smith is the oldest in the office.

My coat is older than yours.

elder和e1dest主要用来表示兄弟姊妹之间的长幼关系,不能修饰物。如:

My elder sister is at college.

He is my eldest daughter.

Who is the eldest of the three (sisters或brothers)?

下面一句最能说明两者之间的区别:

My elder brother is one year older than I.

2. far的比较级和最高级也分别有两种形式，即farther和further; farthest和furthest。对距离进行比较，即表示“更远”、“较远”时，美国英语常用farther, farthest, 英国英语中further较farther更常用。如：

He is too tired to go any further (farther).

The school is on the further (farther) side of the mountain.

further的主要意思是“进一步”(此时不能用farther代替)。如:

Don’t make any change till further notice.

Please wait for further information.

furthest现在已很少使用了，对距离或者是程度比较都常用farthest。如:

Who ran (the ) farthest? She is the farthest advanced of all my students.