My friend is never unpunctual/late. 

What a great fool he is!

He is a very bright student.

Let us obey our teachers.

 Let your health be taken care of.

If you eat a balanced diet, you will be healthy. (1st Conditional)

If you invited me, (2nd Conditional) I would join the party.

Walking in the morning/ Running regularly (Gerund) is a good exercise.

His syllabus is very tough to complete in time. (Infinitive) 

Telling a lie (Gerund)  is a great sin.

Mr. Peter is a good student. He is very (a)studious . He is always (b)mindful to his studies and also (c) dutiful  to his daily activities. He is very (d)respectful to his elders. He is (e)truthful also. Weak students find him as a (f) helpful/helping figure. His (g) thinking power is admirable. He is really (h) creative in any writing. He never forgets the benefit of (i)punctuality. (j) Sincerity is another quality of his daily activities. He is also an early (k)riser. Any problem cannot make him (l)inattentive. He always behaves very (m)politely with every person. His (n) honesty can not be expressed in a word.

Fishes can swim, can't they?

Help the helpless, will you?/ won't you?

'She' is a pronoun, isn't it?

He put the bag here, didn't he?

They seldom come to me, do they? 

The friendship rose in them, didn't it? 

Let's go to the outing, shall we?

Mainul Islam is a qualified teacher in Naogaon. He lives in his village with his two brothers. When he was asked "What makes you decide to stay here in this village?" He replied, "Look, it's true that we could leave this village for a city life. But it didn't attract us."

The modest always respect their superiors,don't they?