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100

As she was dressed all in black, she couldn’t be seen in the starless night.

Dressed all in black, she couldn't be seen in the starless night. 

100

I was eager to catch the bus in good time because I had been told off the day before for arriving late.  

having been told off the day before for arriving late...

100

As she was a nurse, she knew what to do after the accident.  

being a nurse...

100

Waiting for the bus, a car went through a puddle and splashed water all over me.  

change so both parts have same subject

200

My hair has become soft and shining since I’ve used Glosso Shampoo.  USING

Since using Glosso...

200

On arriving at the station, the train had already left.

on arriving at the station, I saw my train had already left.

200

After he had been shown to his room, George lay down on the bed and slept.  HAVING

having been shown

200

Since it began to be sold in supermarkets, milk is usually pasteurised.  

Since being sold

300

When I opened the letter, I realized it was from Professor Alton.  ON

On opening the letter, ...

300

The palace was destroyed by fire during the war but later partly reconstructed.  THOUGH

Though destroyed by fire, the palace was later partly reconstructed

300

Having opened the box, it turned out to be empty.  

having opened the box, I could see that it was empty. 

300

Having lost my money, the conductor wouldn’t give me a ticket.  

Having lost my money, I couldn't buy a ticket.