Some key phrases that act as structures and are commonly used in English.

Level 1

absolutely / totally / completely need to
also of course…
although should
because of this… so
do x (for n.) / do x (to v) so that
generally such as…
had better the next…/the last…
in total therefore
…is best x is about y
mix of x and y yet

Level 2

amongst (group), …. not only…, but also…
apart from/except foron the other hand
as well as… some(one/where/thing/time/place) else
especially ‘Speaking of…’
for instance that said
in fact,… the…er the better
…, in which… unless
instead of…, which leads to…
it gets (adj.) and (adj.) whilst
no matter whether x is increasingly y

Level 3

all things considered in particular / particularly
as it happens / happened,… In short,…
at best…, at worst… nonetheless
bear in mind not remotely like…
don’t…at all over the course of…
far less…, if …at all …rather than…
if…, maybe x should… since (x is true), (do y)
if you…, x will…in return so (adj.) x could (v.)
in comparison …the hell…
in order to… whereas

Level 4

alternativelyotherwise
consequentlyregardless of…
depending on (whether)short of…
if so / if notthe aforementioned
Initially…, but…thus
It goes without saying… what is more
it’s not…, but unless (you want)…when it comes to x, (y is true)
no matter how…which doesn’t…until…
on the whole…with this in mind…
on top of this,… x is synonymous with y

Level 5

according tolet alone/much less/never mind
after alllikewise
as ifnot for another (time)
basicallyon the matter/subject of
from…, through…, to…such a…(can/will/would/might)
in contrast totends to
in other wordsthe former/latter of which
in regard tothus far
it could be arguedx stems from y
it’s not that…; it’s just that…without a doubt

Level 6

above allto illustrate
anywayin essence
as can be seen byin light of
converselyirrespective of
correspondinglyit follows that
either wayit’s bad enough…, but…
grantedmay as well
hencenot withstanding
I would have thoughtparallel to this
if that is the casex alone (will not achieve y)
Different ways to..
give examples