340. Neither one or the other, should be, Neither one nor the other. Neither (not either) means not the one nor the other of two.
341. Better nor that, should be, Better than that.
342. Bad grammar, should be, Bad or ungrammatical English.
343. As soon as ever, should be, As soon as.
344. You will some day be sorry, should be, You will one day be sorry.
345. From now, should be, From this time.
346. Therefore, I thought it proper to write you, should be, Therefore, I think it proper to write to you.
347. There's thirty, should be, There are thirty.
348. Subject matter, should be, The subject.
349. A summer's morning, should be, A summer morning.