MODAL VERBS (ĐỘNG TỪ KHUYẾT THIẾU)
ACTIVE (CHỦ ĐỘNG):
Will
Would
may/might
must
Need
Can
S+ Could + V(nguyên thể) + O
Should
Be able to
Ought to
Had better
Have to
Trang 2PASSIVE (BỊ ĐỘNG):
Will
Would
may/might
must
Need
Can
S+ Could + BE + PII Should
Be able to
Ought to
Had better
Have to