begin的过去式和现在分词怎么写

begin的过去式：began；begin的现在分词：beginning。beganv. 开始；创建；着手于（begin的过去式）beginningn. 开始；起点v. 开始；创建（begin的ing形式）[ 复数 beginnings ]

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例句：

He began to perspire heavily.

他开始大量出汗。

Slowly things began to improve.

慢慢地，情况开始好转了。

He began to tie his shoelaces.

他开始系鞋带。

It was beginning to snow.

开始下雪了。

The paintwork is beginning to peel.

漆面已经开始剥落了。

The economy is beginning to revive.

经济开始复苏。