What is the difference of putting "have/had" before a verb ?<br/><br/>I <u>have ceased</u> working in the company.<br/><br/>vs<br/><br/>I <u>ceased</u> working in the company.<br/><br/>They <u>met</u> last night. <br/><br/>vs <br/><br/>They <u>had met</u> last night.<br/><br/>Can anyone help ? I'm so confused about this ....for many years....