30:17
STRUCTURE
2332 Views
01:56
READING COMPREHENSION &VOCABULARY
1273 Views
01:52
The Form of Irregular Verbs
1280 Views
01:59
The Tense of the Passive Voice
1359 Views
09:31
Changing from Active into Passive
1132 Views
07:20
The Form of the Passive Voice
1344 Views
03:29
What is the Passive Voice?
1384 Views
03:45
The Form of the Active Voice
1345 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1694 Views
03:20
Since vs For
1483 Views
04:50
Have or Has
1298 Views
00:49
Key Words: Present Perfect
3040 Views
09:03
The Use of the Present Perfect
1290 Views
03:08
Meaning and Form
1331 Views
02:40
Writing Formal Letters
1324 Views
03:10
Language Use
1923 Views
09:35
Parallel Structure
1475 Views
04:35
Prepositions of Instruments and Means
1310 Views
03:27
Polite Requests
1377 Views
06:30
May as a Modal of Permission and Request
1358 Views
04:11
Can as a Modal of Permission and Request
1147 Views
02:50
عناصر الاداء
1312 Views
03:45
شركة ستيرن
887 Views
01:15
مقياس القيمة المضافة
1111 Views
02:58
مقياس الربحية
1078 Views
02:39
معايير دركر
1224 Views
03:51
مقايس الاداء
1253 Views
01:41
اتخاذ اجراءات تصحيحية
922 Views
01:52
المرحلة الثانية من الرقابة
942 Views
02:49
مراحل الرقابة
2237 Views