These are common mistakes I hear every day in class.

Most of the errors you will see in this short presentation are due to native language interference. This comes about because:

- The student probably learned with the grammar-translation method

- The structure in English is alien to the structure in Spanish, setting up a classic negative learning situation.

Intensive drilling of the correct form, every day at first and then a periodic surprise progress check, is required to correct these very tenacious errors.