Are these sentences using gerunds and infinitives correctly?

I’ve been studying hard so I expect passing the exam.

• Correct

• Incorrect

She suggested to study together that evening.

• Correct

• Incorrect

We arranged to meet in the library.

• Correct

• Incorrect

My friends appeared finding the exam easy.

• Correct

• Incorrect

I was happy because I managed passing the

exam with 90%.

• Correct

• Incorrect

Please promise not to cheat again!

• Correct

• Incorrect

You risk to fail if you don’t start studying soon.

• Correct

• Incorrect

Have you ever considered to study another

language?

• Correct

• Incorrect