Use the following

(i) Actually, I didn’t intent to come to your place. I reached here without planning.

Actually, I didn’t intent to come to your place. I reached here by accident.

(ii) Sunil, there’s a letter for you in today’s post. There’s one for me also.

Sunil, there’s a letter for you in today’s post. There’s one for me as well.

(iii) Everybody thought I had composed the poem. The truth is my younger sister did it.

Everybody thought I had composed the poem. As a matter of fact, my younger sister did it.

(iv) The doctor told the patient to make sure that he took his pills on time.

The doctor told the patient to see to it that he took his pills on time.

(v) It will be better for us to plan out trip before setting out.

We had better plan out trip before setting out.