⑥start/begin to do sth.→ do sth.；begin → be on

⑥start/begin to do sth.→ do sth.；begin → be on
1) I began to teach at this school in 1995.
I ____ ____ at this school since ____.
2) The film began two minutes ago.
The film ____ ____ ____ for ____ ____.

1) I started teathing at this school since 1995.
since 后面跟时间点,
2)
The film has been stared for two minutes.
have been done后面跟一段时间,

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