คุณควรจะไป
You should to go. X
You should go. ✔
คุณไม่ควรทำแบบนั้น
You shouldn't to do that. X
You shouldn't do that. ✔
คุณต้องทำ
You must to do it. X
You must do it. ✔
ฉันทำได้
I can to do it. X
I can do it. ✔
ฉันอาจจะไป
I might to go. X
I might go. ✔
กริยาช่วยไม่ตามด้วยto