I also need help with my English synthesis and transformation,

1) I was absent from school yesterday, so I did not meet the new principal.
If I had_________________________________.

2) You must not tell the secret. Many want to know the secret.
No matter_________________________________.

3) All the teachers were surprised when Joan Chang arrived early for school.
________________________________surprised all the teachers.

4) The 16- years old adventurer attempted to sail round the world, but she did not succeed.
____________________________________ was not successful.

Try this for #1:

If I had not ...

Let me know how you'd write that sentence, making sure it means the same thing as the original.

1) If I had not been absent from school yesterday, I would have met the new principal.

To transform the given sentence, we need to use the third conditional structure. The conditional clause "If I had not been absent from school yesterday" indicates a hypothetical situation that did not happen. The result clause "I would have met the new principal" indicates the consequence or outcome of that hypothetical situation.

2) No matter how many people want to know the secret, you must not tell it.

To combine the two sentences using "no matter," we need to change the second sentence into a noun phrase. "Many want to know the secret" becomes "how many people want to know the secret." Then, we use "No matter" to introduce the phrase and maintain the same meaning.

3) Joan Chang's early arrival for school surprised all the teachers.

To transform the given sentence, we need to focus on the subject "Joan Chang" and rephrase the sentence accordingly. By moving "Joan Chang" to the beginning and changing "all the teachers were surprised" to "surprised all the teachers," we can maintain the same meaning.

4) The 16-year-old adventurer's attempt to sail round the world was not successful.

To transform the given sentence, we need to focus on the subject "the 16-year-old adventurer" and rephrase the sentence accordingly. By changing "but she did not succeed" to "was not successful," we can maintain the same meaning.