to reminisce about the past, to recall with nostalgia, to talk about past habits or states with sentiment

Well, Well then

Rather, Instead, On the contrary

In short, To sum up, In other words

In other words, That is, Namely

all the more, on the contrary, conversely

It is completely as if, It feels as if, It seems exactly like

I have a feeling that..., It seems to me that..., I feel as if...

not at all, cannot ~ at all, too ~ to ~

Not really, Not particularly, It's not like ... (to be) / I don't particularly ...

Not only..., As well as, Not just... but also

Not A but B, Conjunction showing correction or contrast between two facts/choices, Instead of A, B

Not only ~, but also ~, Not just ~, but ~ as well

only ... and nothing else, nothing but, just this much

It goes without saying that, It is needless to say, No need to mention

Never, By no means

Cannot afford to, No way to, It's not possible to do given the circumstances

Not willing to, Not make an effort to, To not attempt or try to

Perhaps, Maybe, Possibly

Even if ..., Supposing that ..., No matter how ... and yet ...