Jawaban :

1. To state purpose in doing something we can use in order to, so that and to

2. In order to and to are followed by  in order to followed by be ( in order to be )  to followed by V1

3. So that is followed by a clause stating purpose or intent, that clause includes, can, could, may, might, etc  

Penjelasan :

Untuk memberikan pernyataan tujuan ataupun keinginan kita dalam bentuk bahasa inggris biasanya native speaker akan menggunakan conjuction atau kata penghubung berikut ini :  

a. In order to yang diikuti oleh kata kerja / V be untuk  digunakan dalam kalimat nominal sentence  

contoh :  

In order to be happy we should live simply

b. So that, setelah frasa ini biasanya akan diikuti oleh subject

contoh :  

We should study hard so that we can pass the examination in our class

I have to do warming up before doing an exercise

c. To ( untuk / supaya ) to akan diikuti oleh V1

Contoh :  

we should jogging to have stronger lungs

d. So that

contoh :  

We planned to trip early so that we can see sunrise

He came to your house this morning so that she could bring you a medicine

Hope it helps