โครงสร้างของ If cluase Type1 คือ

If + Present Simple, S. + ______ + _______

• will/ V.1

• will/ infinitive

• had/ V.1

• had/ v.3

ข้อใดคือ infinitive ของ "do"

• do

• does

• did

• done

ข้อใดคือ Infinitive ของ "is"

• am

• are

• be

• was

ข้อใด คือ Infinitive ของ "has"

• have

• has

• had

• hasn't

สูตรจำ If clause Type1 คือ

Verb 1 , _____ do

• do

• will

• would

• must

If it rains, you ______ get wet.

• do

• will

• would

• had

If Sally is late again I will ______ mad.

• is

• am

• are

• be

If you don't hurry, you ____ miss the bus.

• will

• would

• had

• be

You _____ miss the bus if you don't hurry.

If you _______(drop) that glass, it will break.

• drop

• drops

• droping

• droped