Using the wrong preposition
1.Boast of or about, not for.
Don’t say: James boasted for his strength.
Say: James boasted of (or about) his strength.
2. Careful of, with or about, not for.
Don’t say: Elke’s very careful for her health.
Say: Elke’s very careful of/about her health.
Or: You should be careful with your money.
Note: Take care of: He takes care of his money.
