2.it is true that (true, /to be sure, /admittedly,)…, but this is not to say (it is unlikely /it doesn’t follow/it doesn’t mean/it won’t be the case) that…
3.it would be possible (natural/reasonable) to think (believe/take the view) that…, but it would be absurd (wrong) to claim (argue) that…
4.there is absolutely (in fact) no (every) reason for us to believe (accept/resist/reject) that…
5.the danger (problem/fact/truth/point) is that…
6.i believe that the title statement is valid because (of)…
7.i agree with the above statement because i believe that…
8.although i appreciate that…, i cannot agree with the title statement.
9.now it is commonly (widely/generally/increasingly) believed (thought /held/accepted/felt/recognized/acknowledged) that… but i wonder (doubt) whether…
10.the increase (change/failure/success) in…mainly (largely/partly) results from (arises from/is because of)…
11.there are many (different/several/a number of/a variety of) causes (reasons) for this dramatic (marked/significant) growth (change/decline/increase) in… first, … second, …finally,…
12.another reason why i dispute the above statement is that…
13.there are numerous reasons why…, and i shall here explore only a few of the most important ones.
二、不同文体写作常用套语
例：议论文的常用套语
as is known to all, it is important to be/do …
i think there are at least two reasons for …
for one thing,… for another , …
let’s take … for example …
from what i have mentioned above we can see that without … we cannot …
it is clear that,… plays an important part in …
it is because … that …
different people, however , have different opinions on this matter .some people think that …
others argue that …
according to them, all of us should …
in their opinion, nobody can … without…
compared with …, … has a lot of advantages over …
there is no doubt that …
in short (in brief /in a word), i firmly support the view that …
so my conclusion is that …