Defining the placement of Parenthesis in the sentence, should be taken into account its position in the sentence and in the whole text. On the one hand, the Parenthesis can function as the cohesion within a sentence; on the other hand, it can be a link between sentences.
In the sentence Parenthesis can be used in the following positions:
At the beginning of the sentence:
“Personally, I think exit interviews are too late,” remarked a former military man [COCA, MAG, 2011].
As a consequence, we should get accustomed to read in human developments, insofar as they represent more or less cooperative answers to God’s invisible grace, occasions for further development [COCA, ACAD, 2010].
2) In the middle:
Well, maybe, but what if those viewers are just watching college football, pro football or, like me, learning to backpack with my scouting son [COCA, NEWS, 2011]?
It seems, at first glance, that new things are what give pleasure to the mind; but there aren’t many new things, and each one is new only once [COCA, ACAD, 2009].
3) In the end:
I mean he was so far the best thing in that movie, in my opinion [COCA, SPOK, 2011].
Speaking about whole text there are parentheses, which are used just at the beginning of the text, some of them in the body and some of them just in the end.
At the beginning of the text can be used the next parentheses:
Firstly, First of all, For a short, In the first place, Initially, To begin/start with, Let us begin, Start by, First and foremost
For instance:
We’re going to focus on, first and foremost, bringing down costs and adding to people’s choices and flexibility [COCA, SPOK, 2011].
For the transition from the introduction to the main body the followings can be pasted:
Second(ly)/third(ly), In the second place, Subsequently, Simultaneously, And then, Next, Then, Moreover, Formerly, Previously, Furthermore
For example:
Near the end of the first century, Pope Clement argues that Jesus’ unmarried state was in no way meant to be an example for everyone: ” the reason that Jesus didn’t marry was that, in the first place, he was already engaged, so to speak, to the church; and, in the second place, he was no ordinary man” [COCA, MAG, 2006].
In the main body the most of parentheses are used. Some of them are:
In my opinion, In my view, To my mind, One the one hand/On the other hand, For example/for instance, Such as, Frequently, As an illustration, To illustrate, Above all, Additionally, As well as, Besides, Equally important, Furthermore, Further
For example:
On the one hand, these low socioeconomic indicators have generally been one of the reasons for rejection of such migrants. One the other hand, these indicators are related not only to the supply of manpower from Mexico, but also to the type of demand for job skills in the United States [COCA, ACAD, 1999].
In the conclusion usually the next words and phrases are given:
Summing up, To sum up, To conclude, In summary, Finally, In short, In brief, In a nutshell, On the whole, Ultimately, Last/lastly, Last of all
For example:
Finally, the military’s retirement program should be revised [COCA, ACAD, 2011].