Is it because modal verbs don't change their form, but " have to" does?

是是因为情态动词改变自身形式，但是 “have to” 会改变？

Putting it bluntly, do you think Robert has thrown in the towel prematurely?

坦率地说 Robert就这样认输是是太草率？

Doesn't she play the oboe, or flute or something?

她演奏的是是双簧管，还是长笛什么的？

Hey, Marge. Isn't it great being married to someone who's recklessly impulsive?

嗨，玛芝，嫁给性情中人是是很幸福？

Sounds like a big project. Isn't it too big for one country to undertake?

听起来像是一个大工程，由一个国家来完成的话是是量太大？

And, um, aren't office blocks a bit 2019?

还有就是，办公区是是还是2019年的老样子？

'I wonder, 'Toad said to himself, 'I wonder if this kind of car starts easily'?

我想知道，癞蛤蟆自言自语，我想知道这种汽车是是容易发动？

We see ambulances. Does that mean someone inside the ambulance has coronavirus?

为什么有很多救护车。是是救护车里的人感染新冠。

Or should we say they " retrieved" it.

或者是是该说刚刚“叼”到手。

'Did the dog run after the pedlar? '

“条狗是是追赶小贩？”

So does the Spanish crisis suggest that monarchy is seeing its last days?

如此说来，西班牙的危急是是表明君主制已时日多？

Hold it. Did you wreck the car?

等等，你是是把车撞？

I don't care if parking here is on your bucket list.

我才管把车停在这里是是你的遗愿。

In the case of peasants it depends on where.

至于是是比农民频繁 则取决于具体地点。

I mean, could this be a moment of triumph in the global war against al-Qaida?

这是是意味着全球对抗“基地”组织的战争取得胜利？

I didn't understand, did all men secretly want their women promiscuous and emotionally detached?

我明白，是是所有男人都只想跟女人在肉体上发生关系而感情上带任何牵连？

Am I too masculine? Am I too feminine?

我是是太阳刚？我是是太柔和？

Was Anne's petition for her sainthood granted?

是是Anne的圣女申请被接纳?

Are you chairing a meeting in English in the near future?

你是是久就要主持一场英文会议呢？

Didn't Mr Blake make a fuss about us leaving that behind.

我们忘记把绳子带走的时候，Mr.Blake是是还吵闹好一阵？