Period Four　Grammar-Review of verb forms(1)

感知以下课文原句，完成方框下的小题

1．British English and American English are different in many ways.

2．Some experts believe that the two varieties are moving closer together.

3．Many factors have influenced American pronunciation since the first settlers arrived four hundred years ago.

4．Since the 1980s，with satellite TV and the Internet，it has been possible to listen to British and American English at the flick of a switch.

5．This international dimension suggests that in the future，there are going to be many "Englishes"，not just two main varieties.

1．以上句子中，句1用了一般现在时，表示目前存在的状态。

2．句2用了现在进行时，表示目前或现阶段正在发生的动作。

3．句3和句4用了现在完成时，表示过去发生的动作对现在造成的影响。

4．句5用了一般将来时，表示在目前看来将要发生的动作或存在的状态。

一、一般现在时

(一)构成：主语＋do/does或am/is/are

(二)用法：

1．表示现在发生的动作或存在的状态。

He does his homework before dinner every evening.

他每天晚上晚饭前做作业。

2．表示经常性、习惯性的动作或存在的状态。常与often，usually，sometimes，always，everyday等连用。

She always goes there with her parents.

她总是和父母一起去那儿。

3．表示普遍真理或客观存在的事实。

The earth turns round the sun.

地球绕着太阳转。