The document provides examples of topic sentences that introduce how-to instructions for changing a flat tire, soothing a crying baby, and making pizza. It notes that effective topic sentences include a topic, controlling part that provides context for why the instructions are needed, and a transition word like "if" to connect the topic and controlling part. The final example given is a topic sentence for 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^-
^