1.
a) Can you explain this word to me?
b) Can you explain me this word?

2.
a) I got angry with Mark. Afterwards, I apologised to him.
b) I got angry with Mark. Afterwards I apologised him.

3.
a) Amy won't be able to help you. There's no point in asking to her.
b) Amy won't be able to help you. There's no point in asking her.

4.
a) I need somebody to explain me what I have to do.
b) I need somebody to explain to me what I have to do.

5.
a) They didn't understand the system, so I explained it to them.
b) They didn't understand the system, so I explained it them.

6.
a) I like to sit on the beach and listen to the sound of the sea.
b) I like to sit on the beach and listen the sound of the sea.

7.
a) I asked them to describe me exactly what happened.
b) I asked them to describe to me exactly what happened.

8.
a) We'd better phone the restaurant to reserve a table.
b) We'd better phone to the restaurant to reserve a table.

9.
a) It was a difficult question. I couldn't answer to it.
b) It was a difficult question. I couldn't answer it.

10.
a) I explained everybody the reasons for my decision.
b) I explained to everybody the reasons for my decision.

11.
a) I thanked everybody for all the help they had given me.
b) I thanked to everybody for all the help they had given me.

12.
a) My friend texted to me to let me know she was going to be late.
b) My friend texted me to let me know she was going to be late.