Some errors made by students at Tho Xuan 4 high school when doing exercises on English nominal clauses and suggestions for teaching them 1 PART A INTRODUCTION I Reasons for Choosing the Study Nowadays English has become an international language It plays an important role in enhancing the solidarity among the countries all over the world and is also used in every field of society Realizing its importance, most of Vietnamese schools choose it to be one of the obligatory subjects However, learning[.]