It is easy to identify a main idea that is directly expressed in the text. Main ideas are often found:

at the beginning of paragraphs. The first sentence often explains the subject being discussed in the passage.
in the concluding sentences of a paragraph. The main idea can be expressed as a summation of the information in the paragraph as well as a link to the information in the next paragraph.

Writing Tutorial - Main Idea Explained

writing-tutorial-main-idea-explained

Let's do English ESL deep listening: focus on meaning. It is easy to identify a main idea that is directly expressed in the text. Main ideas are often found:

a…