Giving your view (a mi modo de ver, según se mire, lo cierto es que)

Saying what you think, and how sure you are

At B2 you are expected to argue a point, not only state it. These markers frame an opinion, generalise, add a reservation or bring a topic back to the facts.

you want to…say
give your opiniona mi modo de ver
speak in generalen líneas generales
say it dependssegún se mire
state the factslo cierto es que
add a reservationeso sí
give the other sidepor su parte
narrow the topica la hora de

Opinions and generalisations

A mi modo de ver is a little more careful than creo que:

The way I see it, that article has a bias.
A mi modo de ver, ese artículo tiene un sesgo.

Según se mire can be a whole answer:

Is it expensive? It depends how you look at it.
¿Es caro? Según se mire.

Facts and reservations

Lo cierto es que often sets the facts against what someone claims:

He says he has no prejudices, but the fact is that he has them.
Dice que no tiene prejuicios, pero lo cierto es que los tiene.

Eso sí adds a qualification to what you have just said: usually a condition or a drawback after something good, sometimes a plus after something bad (es caro; eso sí, dura años):

The hotel is cheap; mind you, it is far from the centre.
El hotel es barato; eso sí, está lejos del centro.

Sides and topics

Por su parte brings in another party's position. Su covers him, her, it, them and usted; for your own position, say por mi parte.

The government, for its part, has said nothing.
El gobierno, por su parte, no ha dicho nada.

A la hora de + infinitive is when it comes to. Tener que ver con is to have to do with; with nada it rejects a point:

That has nothing to do with the topic.
Eso no tiene nada que ver con el tema.

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