Read the【Case Reflection】in this section and think about the questions.

When teaching a new unit, Mr G is used to going through the vocabulary list first, and explaining all the words on the list.

The teaching model he follows is: lead in—reading—explaining—memorizing—dictating. He explains each key word systematically by introducing the relevant Chinese meanings, collocations, and examples, and then requires students to take notes. However, most of the students still cannot comprehend and use the new words correctly in the succeeding activities of listening, speaking, reading, and writing. Please analyse the causes.