*For improving writing skill  

Introduction

This passage introduces ..
However, lecturer effectively challenges ..

Body

First, the lecturere asserts(disagrees) that ..
It is because(To illustrate her point, she talks about ..) ..
This counters the claim in the reading passage that ..

Second(In addition), the lecturer contends(does not agree) that ..
The lecturer points out(emphasizes) that .. This contradicts the reading passage’s claim that ..

Finally(Third), the lecturer maintains(does not think) that ..
The lecturer mentions that ..

Conclusion

This refutes the reading passage’s argument that ..

Introduction

Some people think that ..
However, I strongly believe that ..
And there are two(many) reasons.

Body

To being with(First), subject enabels object to predicate.
To be specific(In particular), ..
For example(instance) ..

Additionally, subject allows object to predicate.
Compare to(Unless) argument/subject, ..
For instance, (many experts have insist that) ..
(Recent studies have shown that ..)

Conclusion

In conclusion, ..
Therefore, I think that ..