The document provides examples of topic sentences that introduce how-to instructions for specific tasks like changing a flat tire, soothing a crying baby, and making pizza. It notes that effective topic sentences include the controlling part that establishes why the instructions are important or necessary, such as not being stranded, not wearing ear plugs, or enjoying dinner. The document then provides an example of a well-constructed topic sentence for instructions on saving battery life on an iPhone by following advice.

1. 14011988 Kim Jin-sun
English Writing 002

2. Topic sentence
= +topic part controlling part

3. Anyone can change a flat tire by taking
these steps.
It’s easy to soothe a crying baby if you
follow my advice.
Follow these instruction to make delicious
pizza.
Topic ,how ,why

4.  If you don’t want to be stranded on the side
of the roads, you can easily change a flat
tire by following these steps.
 If you don’t want to wear ear plugs in daily
life, you can soothe a crying baby following
this advice.
 If you want to enjoy your dinner, you can
follow these instructions to make delicious
pizza.

5. Topic: Save battery life on an iphone
If your iphone has a short battery life,
you can save it by following my advice.

6. Topic How Why
Well-made
topic
sentence

7. Thank you