Infinitive without to   วิธีใช้
       1. ตามหลัง Helping verb (Auxiliary verb) ยกเว้น be, have, ought, used เช่น
                Don’t mention it.
          You must drive on the left side.
          2. ตามหลัง had better, would rather, rather than, but
                You’d better see the doctor.
          She’d rather watch TV. than listen to the radio.
          3. หลัง กริยาต่อไปนี้ have [somebody do something], please, help, let, make                ใน active voice
          They let the thief escape.           [Active]
          The thief was let escape.           [Passive]
          4. หลัง กริยาต่อไปนี้ จะตามด้วย inf. Without to หรือ present participle [V.ing]
          See              watch          notice          observe       hear
          Smell           feel
          I heard your phone ring last night.       [a complete action]
          I heard your phone ringing last night.   [continuous action]   วิธีใช้
       1. ตามหลัง Helping verb (Auxiliary verb) ยกเว้น be, have, ought, used เช่น
                Don’t mention it.
          You must drive on the left side.
          2. ตามหลัง had better, would rather, rather than, but
                You’d better see the doctor.
          She’d rather watch TV. than listen to the radio.
          3. หลัง กริยาต่อไปนี้ have [somebody do something], please, help, let, make                ใน active voice
          They let the thief escape.           [Active]
          The thief was let escape.           [Passive]
          4. หลัง กริยาต่อไปนี้ จะตามด้วย inf. Without to หรือ present participle [V.ing]
          See              watch          notice          observe       hear
          Smell           feel
          I heard your phone ring last night.       [a complete action]
          I heard your phone ringing last night.   [continuous action]