The modal adverb 倒是
The modal adverb (语气副词) expresses subjective judgment or assurance toward an action.
We use the adverb 倒是 
to soften a statement. We use it in interrogative sentences to find something out .
We should state 倒是 before a verb or a verb phrase.
to soften a statement. We use it in interrogative sentences to find something out .
We should state 倒是 before a verb or a verb phrase. Pay attention
A verb phrase is a combination of a verb and an auxiliary word. The auxiliary word can be either an auxiliary verb or an object.
Examples
你倒是要不要来？
Would you rather come?
nǐ dǎoshì yào bú yào lái
我倒是希望有一个旅伴得很呢
I would like to have a travel partner very much!
wǒ dǎoshì xīwàng yǒu yí ge lǚbàn de hěn ne
Pay attention
In this case, 倒是 is very similar to 到底 .
.However sometimes 倒是 can be translated as "though".
Examples
我们本倒是愿意邀请所有亲戚的，但总得有个限度呀
Although we would have liked to invite all our relatives, there must be a limit!
wǒmen běn dǎoshì yuànyì yāoqǐng suǒyǒu qīnqī de, dàn zǒngde yǒu ge xiàndù ya
我们倒是是朋友，但是一些东西我不会跟他说
Though we are friends, there are some things I will not say to him
wǒmen dǎoshì shì péngyou, dànshì yìxiē dōngxi wǒ bú huì gēn tā shuō
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