The structure 还是…吧
The structure 还是…吧 
is used to express a recommended course of action to someone.
This type of sentence is imperative in nature.
is used to express a recommended course of action to someone.
This type of sentence is imperative in nature.Scheme
subject
还是
(subject)
predicate
verb phrase
吧
Pay attention
A subject can be placed before and after 还是.
Examples
我们还是帮帮他吧
We’d better go help him
wǒmen háishi bāngbāng tā ba
快迟到了 ，我们还是打车吧
We are going to be late. We’d better take a cab
kuài chídào le, wǒmen háishi dǎchē ba
太晚了，还是先回家吧
It is too late. We’d better go home
tài wǎn le, háishi xiān huíjiā ba
If a sentence is negative, the particle 吧 is often omitted. It is replaced with the particle 了 at the end of the sentence.
at the end of the sentence.Examples
太贵了，还是别买了
It is too expensive, you’d better not buy it
tài guì le, háishi bié mǎi le
她不想说，还是不要再问了
She doesn’t want to talk about it. You’d better not ask her again
tā bù xiǎng shuō, háishi bú yào zài wèn le
他一定不同意，还是别跟他说了
He is definitely not going to agree. You’d better not tell him
tā yídìng bù tóngyì, háishi bié gēn tā shuō le