Tham khảo tài liệu 'writting toefl detail 7', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 72 TOEFL EXAM ESSENTIALS Irregular Verbs with the Same Present and Past Participle Forms Present Past Past Participle come overcome run came overcame ran come overcome run Review these common errors involving verb tense so that you can identify them on the structure test Mixed verb tenses Switching tense within a sentence can change its meaning. Generally a passage that begins in the present tense should continue in the present tense. Improper past tense Don t use past tense to make a statement about a present condition. Incorrect Zelda met the new director. He was very tall. Isn t he still tall Correct Zelda met the new director. He is very tall. Subjunctive mood The subjective mood of verbs expresses something that is imagined wished for or contrary to fact. The subjunctive of was is were. If I were rich I d quit my job and move to Tahiti. I am not rich. If you were a dog you would be entirely dependent upon human beings. You are not a dog. STRUCTURE 73 Practice Circle the correct verb in each sentence. Find the answers on page 83. 21. Statistics was were my most difficult course in high school. 22. The clerk rings ring up the sales while the customers waits wait in line. 23. Has Have either of the tenants paid the rent 24. If I was were on the school board I d abolish the dress code. 25. I stayed at a bed and breakfast inn in Vermont. The building is was Victorian. TRICKY VERBS The sets of verbs on the next page confuse even native speakers of English. To keep them straight think about which verb in each pair needs an object. For example lie describes an action performed by a subject I will lie down. Lay on the other hand needs an object to make sense He lays the baby in the crib. To make things more confusing the past tense of lie is lay Review this chart and practice using these tricky verbs in context. PREPOSITIONAL IDIOMS Knowing which preposition to of about for with about on upon etc. is appropriate in a sentence is a challenging part of mastering English.
